diff --git a/locales/rn/ar.json b/locales/rn/ar.json
index 464526d0..7e058448 100644
--- a/locales/rn/ar.json
+++ b/locales/rn/ar.json
@@ -292,6 +292,25 @@
     "no_sent_folder": "لم يتم العثور على مجلد المرسل",
     "permission_camera": "يلزم إذن الكاميرا لالتقاط صورة.",
     "permission_photos": "يلزم إذن مكتبة الصور لإرفاق الصور.",
+    "placeholder_warning": {
+      "title": "التحقق من العناصر النائبة؟",
+      "message": "تحتوي رسالتك على نص نائب سيراه المستلمون. هل تريد تعديله قبل الإرسال؟",
+      "found": "العناصر النائبة التي عُثر عليها",
+      "more": "و{count} أخرى",
+      "dont_ask_again": "عدم السؤال مرة أخرى",
+      "send_anyway": "الإرسال على أي حال",
+      "back": "العودة إلى التعديل"
+    },
+    "placeholder_words": {
+      "before": [
+        "أدخل",
+        "ادخل",
+        "أضف",
+        "اكتب"
+      ],
+      "after": [],
+      "unfinished": []
+    },
     "recipient_add_contact": "إضافة إلى جهات الاتصال",
     "recipient_copy": "نسخ العنوان",
     "recipient_move_to": "نقل إلى {field}",
@@ -820,6 +839,10 @@
         "ask_mobile": "السؤال",
         "block_mobile": "الحظر"
       },
+      "placeholder_warning": {
+        "label": "تحذير العناصر النائبة",
+        "description": "طلب تأكيد قبل إرسال رسالة لا تزال تحتوي على عناصر نائبة مثل [TIME] أو [أدخل الاسم]، أو حقول قالب فارغة، أو نص غير مكتمل مثل TODO أو TBD."
+      },
       "plain_text_mode": {
         "description_mobile": "الكتابة والقراءة بنص عادي فقط."
       },
diff --git a/locales/rn/ca.json b/locales/rn/ca.json
index 32c92040..44d6ff65 100644
--- a/locales/rn/ca.json
+++ b/locales/rn/ca.json
@@ -292,6 +292,30 @@
     "no_sent_folder": "No s'ha trobat la carpeta Enviats",
     "permission_camera": "Cal permís per a la càmera per fer una foto.",
     "permission_photos": "Cal permís per a la galeria de fotos per adjuntar imatges.",
+    "placeholder_warning": {
+      "title": "Voleu revisar els marcadors?",
+      "message": "El missatge té text de marcador que veuran els destinataris. Voleu editar-lo abans d'enviar-lo?",
+      "found": "Marcadors trobats",
+      "more": "i {count} més",
+      "dont_ask_again": "No ho tornis a preguntar",
+      "send_anyway": "Envia igualment",
+      "back": "Torna a l'edició"
+    },
+    "placeholder_words": {
+      "before": [
+        "el teu",
+        "la teva",
+        "el vostre",
+        "la vostra",
+        "insereix",
+        "inseriu",
+        "afegeix",
+        "afegiu",
+        "escriviu"
+      ],
+      "after": [],
+      "unfinished": []
+    },
     "recipient_add_contact": "Afegeix als contactes",
     "recipient_copy": "Copia l'adreça",
     "recipient_move_to": "Mou a {field}",
@@ -820,6 +844,10 @@
         "ask_mobile": "Pregunta",
         "block_mobile": "Bloqueja"
       },
+      "placeholder_warning": {
+        "label": "Avís de marcadors",
+        "description": "Demana confirmació abans d'enviar un missatge que encara té marcadors com [TIME] o [El teu nom], camps de plantilla buits o text inacabat com TODO o TBD."
+      },
       "plain_text_mode": {
         "description_mobile": "Redacta i llegeix només en text sense format."
       },
diff --git a/locales/rn/cs.json b/locales/rn/cs.json
index cb54679a..5de98a98 100644
--- a/locales/rn/cs.json
+++ b/locales/rn/cs.json
@@ -292,6 +292,30 @@
     "no_sent_folder": "Složka Odeslané nebyla nalezena",
     "permission_camera": "K pořízení fotky je potřeba oprávnění k fotoaparátu.",
     "permission_photos": "K připojení obrázků je potřeba oprávnění ke knihovně fotek.",
+    "placeholder_warning": {
+      "title": "Zkontrolovat zástupné texty?",
+      "message": "Vaše zpráva obsahuje zástupný text, který příjemci uvidí. Chcete ji před odesláním upravit?",
+      "found": "Nalezené zástupné texty",
+      "more": "a další ({count})",
+      "dont_ask_again": "Znovu se neptat",
+      "send_anyway": "Přesto odeslat",
+      "back": "Zpět k úpravám"
+    },
+    "placeholder_words": {
+      "before": [
+        "vaše",
+        "váš",
+        "vaši",
+        "tvoje",
+        "tvůj",
+        "vložte",
+        "doplňte",
+        "zadejte",
+        "uveďte"
+      ],
+      "after": [],
+      "unfinished": []
+    },
     "recipient_add_contact": "Přidat do kontaktů",
     "recipient_copy": "Kopírovat adresu",
     "recipient_move_to": "Přesunout do pole {field}",
@@ -820,6 +844,10 @@
         "ask_mobile": "Ptát se",
         "block_mobile": "Blokovat"
       },
+      "placeholder_warning": {
+        "label": "Upozornění na zástupné texty",
+        "description": "Před odesláním zprávy, která stále obsahuje zástupné texty jako [TIME] nebo [Vaše jméno], nevyplněná pole šablony nebo nedokončený text jako TODO či TBD, požádat o potvrzení."
+      },
       "plain_text_mode": {
         "description_mobile": "Psát a číst pouze v prostém textu."
       },
diff --git a/locales/rn/da.json b/locales/rn/da.json
index 70bcabfd..e3cd0e49 100644
--- a/locales/rn/da.json
+++ b/locales/rn/da.json
@@ -292,6 +292,27 @@
     "no_sent_folder": "Ingen Sendt-mappe fundet",
     "permission_camera": "Der kræves kameratilladelse for at tage et foto.",
     "permission_photos": "Der kræves tilladelse til fotobiblioteket for at vedhæfte billeder.",
+    "placeholder_warning": {
+      "title": "Tjek pladsholdere?",
+      "message": "Din besked indeholder pladsholdertekst, som modtagerne vil se. Vil du redigere den, før du sender?",
+      "found": "Fundne pladsholdere",
+      "more": "og {count} mere",
+      "dont_ask_again": "Spørg ikke igen",
+      "send_anyway": "Send alligevel",
+      "back": "Tilbage til redigering"
+    },
+    "placeholder_words": {
+      "before": [
+        "din",
+        "dit",
+        "dine",
+        "indsæt",
+        "tilføj",
+        "skriv"
+      ],
+      "after": [],
+      "unfinished": []
+    },
     "recipient_add_contact": "Tilføj til kontakter",
     "recipient_copy": "Kopiér adresse",
     "recipient_move_to": "Flyt til {field}",
@@ -820,6 +841,10 @@
         "ask_mobile": "Spørg",
         "block_mobile": "Blokér"
       },
+      "placeholder_warning": {
+        "label": "Advarsel om pladsholdere",
+        "description": "Bed om bekræftelse, før en besked sendes, der stadig har pladsholdere som [TIME] eller [Dit navn], tomme skabelonfelter eller ufærdig tekst som TODO eller TBD."
+      },
       "plain_text_mode": {
         "description_mobile": "Skriv og læs kun i ren tekst."
       },
diff --git a/locales/rn/de.json b/locales/rn/de.json
index 4fdbc8bb..03a89a1c 100644
--- a/locales/rn/de.json
+++ b/locales/rn/de.json
@@ -294,6 +294,31 @@
     "no_sent_folder": "Kein Gesendet-Ordner gefunden",
     "permission_camera": "Zum Aufnehmen eines Fotos ist die Kameraberechtigung erforderlich.",
     "permission_photos": "Zum Anhängen von Bildern ist die Berechtigung für die Fotomediathek erforderlich.",
+    "placeholder_warning": {
+      "title": "Platzhalter prüfen?",
+      "message": "Die Nachricht enthält Platzhaltertext, den die Empfänger sehen. Vor dem Senden bearbeiten?",
+      "found": "Gefundene Platzhalter",
+      "more": "und {count} weitere",
+      "dont_ask_again": "Nicht mehr fragen",
+      "send_anyway": "Trotzdem senden",
+      "back": "Zurück zur Bearbeitung"
+    },
+    "placeholder_words": {
+      "before": [
+        "ihr",
+        "ihre",
+        "ihren",
+        "dein",
+        "deine",
+        "deinen"
+      ],
+      "after": [
+        "einfügen",
+        "eintragen",
+        "ergänzen"
+      ],
+      "unfinished": []
+    },
     "recipient_add_contact": "Zu Kontakten hinzufügen",
     "recipient_copy": "Adresse kopieren",
     "recipient_move_to": "Verschieben nach {field}",
@@ -829,6 +854,10 @@
         "ask_mobile": "Fragen",
         "block_mobile": "Blockieren"
       },
+      "placeholder_warning": {
+        "label": "Warnung bei Platzhaltern",
+        "description": "Vor dem Senden einer Nachricht nachfragen, die noch Platzhalter wie [TIME] oder [Ihr Name], leere Vorlagenfelder oder unfertigen Text wie TODO oder TBD enthält."
+      },
       "plain_text_mode": {
         "description_mobile": "Nur im Klartext verfassen und lesen."
       },
diff --git a/locales/rn/en.json b/locales/rn/en.json
index 983d1aea..3819effd 100644
--- a/locales/rn/en.json
+++ b/locales/rn/en.json
@@ -306,6 +306,32 @@
     "no_sent_folder": "No Sent folder found",
     "permission_camera": "Camera permission is required to take a photo.",
     "permission_photos": "Photo library permission is required to attach images.",
+    "placeholder_warning": {
+      "back": "Back to editing",
+      "dont_ask_again": "Don't ask again",
+      "found": "Placeholders found",
+      "message": "Your message has placeholder text that recipients will see. Do you want to edit it before sending?",
+      "more": "and {count} more",
+      "send_anyway": "Send anyway",
+      "title": "Check placeholders?"
+    },
+    "placeholder_words": {
+      "after": [],
+      "before": [
+        "your",
+        "insert",
+        "enter",
+        "add"
+      ],
+      "unfinished": [
+        "TODO",
+        "TBD",
+        "TBA",
+        "TBC",
+        "FIXME",
+        "XXX"
+      ]
+    },
     "read_receipt_off": "Request a read receipt",
     "recipient_add_contact": "Add to contacts",
     "recipient_copy": "Copy address",
@@ -911,6 +937,10 @@
         "ask_mobile": "Ask",
         "block_mobile": "Block"
       },
+      "placeholder_warning": {
+        "description": "Ask for confirmation before sending a message that still has placeholders like [TIME] or [Your Name], template fields left empty, or unfinished text like TODO or TBD.",
+        "label": "Placeholder warning"
+      },
       "plain_text_mode": {
         "description_mobile": "Compose and read in plain text only."
       },
diff --git a/locales/rn/es.json b/locales/rn/es.json
index 444d7611..65890c30 100644
--- a/locales/rn/es.json
+++ b/locales/rn/es.json
@@ -292,6 +292,36 @@
     "no_sent_folder": "No se encontró la carpeta Enviados",
     "permission_camera": "Se necesita permiso de cámara para tomar una foto.",
     "permission_photos": "Se necesita acceso a la galería de fotos para adjuntar imágenes.",
+    "placeholder_warning": {
+      "title": "¿Revisar los marcadores?",
+      "message": "El mensaje tiene texto de marcador que verán los destinatarios. ¿Editarlo antes de enviar?",
+      "found": "Marcadores encontrados",
+      "more": "y {count} más",
+      "dont_ask_again": "No volver a preguntar",
+      "send_anyway": "Enviar de todos modos",
+      "back": "Volver a editar"
+    },
+    "placeholder_words": {
+      "before": [
+        "tu",
+        "tus",
+        "su",
+        "sus",
+        "insertar",
+        "inserte",
+        "inserta",
+        "añadir",
+        "añade",
+        "agregar",
+        "agrega",
+        "escribe",
+        "escriba",
+        "indica",
+        "indique"
+      ],
+      "after": [],
+      "unfinished": []
+    },
     "recipient_add_contact": "Añadir a contactos",
     "recipient_copy": "Copiar dirección",
     "recipient_move_to": "Mover a {field}",
@@ -820,6 +850,10 @@
         "ask_mobile": "Preguntar",
         "block_mobile": "Bloquear"
       },
+      "placeholder_warning": {
+        "label": "Aviso de marcadores",
+        "description": "Pedir confirmación antes de enviar un mensaje que todavía tiene marcadores como [TIME] o [Tu nombre], campos de plantilla vacíos o texto sin terminar como TODO o TBD."
+      },
       "plain_text_mode": {
         "description_mobile": "Redactar y leer solo en texto sin formato."
       },
diff --git a/locales/rn/fa.json b/locales/rn/fa.json
index 39d797d8..6c7ec588 100644
--- a/locales/rn/fa.json
+++ b/locales/rn/fa.json
@@ -292,6 +292,24 @@
     "no_sent_folder": "پوشه ارسال شده پیدا نشد",
     "permission_camera": "برای گرفتن عکس، دسترسی به دوربین لازم است.",
     "permission_photos": "برای پیوست کردن تصاویر، دسترسی به گالری عکس لازم است.",
+    "placeholder_warning": {
+      "title": "متن‌های جایگزین بررسی شود؟",
+      "message": "پیام شما متن جایگزینی دارد که گیرندگان آن را می‌بینند. می‌خواهید پیش از ارسال آن را ویرایش کنید؟",
+      "found": "متن‌های جایگزین یافت‌شده",
+      "more": "و {count} مورد دیگر",
+      "dont_ask_again": "دیگر نپرس",
+      "send_anyway": "ارسال به هر حال",
+      "back": "بازگشت به ویرایش"
+    },
+    "placeholder_words": {
+      "before": [],
+      "after": [
+        "شما",
+        "وارد کنید",
+        "اضافه کنید"
+      ],
+      "unfinished": []
+    },
     "recipient_add_contact": "افزودن به مخاطبین",
     "recipient_copy": "کپی نشانی",
     "recipient_move_to": "انتقال به {field}",
@@ -820,6 +838,10 @@
         "ask_mobile": "بپرس",
         "block_mobile": "مسدود"
       },
+      "placeholder_warning": {
+        "label": "هشدار متن جایگزین",
+        "description": "پیش از ارسال پیامی که هنوز متن جایگزین مانند [TIME] یا [نام شما]، فیلدهای خالی الگو یا متن ناتمام مانند TODO یا TBD دارد، تأیید بگیرید."
+      },
       "plain_text_mode": {
         "description_mobile": "نوشتن و خواندن فقط به‌صورت متن ساده."
       },
diff --git a/locales/rn/fr.json b/locales/rn/fr.json
index 1a4d07db..f06fe0e0 100644
--- a/locales/rn/fr.json
+++ b/locales/rn/fr.json
@@ -292,6 +292,34 @@
     "no_sent_folder": "Aucun dossier Envoyés trouvé",
     "permission_camera": "L'autorisation d'accès à l'appareil photo est nécessaire pour prendre une photo.",
     "permission_photos": "L'autorisation d'accès à la photothèque est nécessaire pour joindre des images.",
+    "placeholder_warning": {
+      "title": "Vérifier les espaces réservés ?",
+      "message": "Votre message contient du texte d'espace réservé que les destinataires verront. Voulez-vous le modifier avant l'envoi ?",
+      "found": "Espaces réservés trouvés",
+      "more": "et {count} de plus",
+      "dont_ask_again": "Ne plus me demander",
+      "send_anyway": "Envoyer quand même",
+      "back": "Retour à l'édition"
+    },
+    "placeholder_words": {
+      "before": [
+        "votre",
+        "vos",
+        "ton",
+        "ta",
+        "tes",
+        "insérer",
+        "insérez",
+        "ajouter",
+        "ajoutez",
+        "saisir",
+        "saisissez",
+        "indiquer",
+        "indiquez"
+      ],
+      "after": [],
+      "unfinished": []
+    },
     "recipient_add_contact": "Ajouter aux contacts",
     "recipient_copy": "Copier l'adresse",
     "recipient_move_to": "Déplacer vers {field}",
@@ -820,6 +848,10 @@
         "ask_mobile": "Demander",
         "block_mobile": "Bloquer"
       },
+      "placeholder_warning": {
+        "label": "Avertissement d'espaces réservés",
+        "description": "Demander confirmation avant d'envoyer un message qui contient encore des espaces réservés comme [TIME] ou [Votre nom], des champs de modèle vides ou du texte inachevé comme TODO ou TBD."
+      },
       "plain_text_mode": {
         "description_mobile": "Rédiger et lire uniquement en texte brut."
       },
diff --git a/locales/rn/he.json b/locales/rn/he.json
index f20d0c1f..e2284ede 100644
--- a/locales/rn/he.json
+++ b/locales/rn/he.json
@@ -292,6 +292,28 @@
     "no_sent_folder": "לא נמצאה תיקיית \"נשלח\"",
     "permission_camera": "נדרשת הרשאת מצלמה כדי לצלם תמונה.",
     "permission_photos": "נדרשת הרשאה לספריית התמונות כדי לצרף תמונות.",
+    "placeholder_warning": {
+      "title": "לבדוק מצייני מיקום?",
+      "message": "ההודעה מכילה טקסט מציין מיקום שהנמענים יראו. לערוך אותה לפני השליחה?",
+      "found": "מצייני מיקום שנמצאו",
+      "more": "ועוד {count}",
+      "dont_ask_again": "אל תשאל שוב",
+      "send_anyway": "שלח בכל זאת",
+      "back": "חזור לעריכה"
+    },
+    "placeholder_words": {
+      "before": [
+        "הכנס",
+        "הכניסו",
+        "הזן",
+        "הוסף"
+      ],
+      "after": [
+        "שלך",
+        "שלכם"
+      ],
+      "unfinished": []
+    },
     "recipient_add_contact": "הוסף לאנשי הקשר",
     "recipient_copy": "העתק כתובת",
     "recipient_move_to": "העבר אל {field}",
@@ -820,6 +842,10 @@
         "ask_mobile": "שאל",
         "block_mobile": "חסום"
       },
+      "placeholder_warning": {
+        "label": "אזהרה על מצייני מיקום",
+        "description": "בקש אישור לפני שליחת הודעה שעדיין יש בה מצייני מיקום כמו [TIME] או [השם שלך], שדות תבנית ריקים או טקסט לא גמור כמו TODO או TBD."
+      },
       "plain_text_mode": {
         "description_mobile": "כתיבה וקריאה בטקסט רגיל בלבד."
       },
diff --git a/locales/rn/hu.json b/locales/rn/hu.json
index 834df745..1097b64e 100644
--- a/locales/rn/hu.json
+++ b/locales/rn/hu.json
@@ -292,6 +292,26 @@
     "no_sent_folder": "Nem található Elküldött mappa",
     "permission_camera": "Fénykép készítéséhez kameraengedély szükséges.",
     "permission_photos": "Képek csatolásához hozzáférés szükséges a fotókhoz.",
+    "placeholder_warning": {
+      "title": "Ellenőrzi a helykitöltőket?",
+      "message": "Az üzenet olyan helykitöltő szöveget tartalmaz, amelyet a címzettek is látni fognak. Szerkeszti küldés előtt?",
+      "found": "Talált helykitöltők",
+      "more": "és még {count}",
+      "dont_ask_again": "Ne kérdezze többé",
+      "send_anyway": "Küldés így is",
+      "back": "Vissza a szerkesztéshez"
+    },
+    "placeholder_words": {
+      "before": [
+        "az ön",
+        "a te",
+        "írja be",
+        "illessze be",
+        "adja meg"
+      ],
+      "after": [],
+      "unfinished": []
+    },
     "recipient_add_contact": "Hozzáadás a névjegyekhez",
     "recipient_copy": "Cím másolása",
     "recipient_move_to": "Áthelyezés ide: {field}",
@@ -820,6 +840,10 @@
         "ask_mobile": "Rákérdezés",
         "block_mobile": "Blokkolás"
       },
+      "placeholder_warning": {
+        "label": "Figyelmeztetés helykitöltők esetén",
+        "description": "Megerősítés kérése olyan üzenet küldése előtt, amelyben még helykitöltők vannak, például [TIME] vagy [Az Ön neve], üres sablonmezők vagy befejezetlen szöveg, például TODO vagy TBD."
+      },
       "plain_text_mode": {
         "description_mobile": "Írás és olvasás csak egyszerű szövegként."
       },
diff --git a/locales/rn/it.json b/locales/rn/it.json
index 771ce157..af57f520 100644
--- a/locales/rn/it.json
+++ b/locales/rn/it.json
@@ -292,6 +292,32 @@
     "no_sent_folder": "Nessuna cartella Inviati trovata",
     "permission_camera": "Serve l'autorizzazione alla fotocamera per scattare una foto.",
     "permission_photos": "Serve l'autorizzazione alla galleria foto per allegare immagini.",
+    "placeholder_warning": {
+      "title": "Controllare i segnaposto?",
+      "message": "Il messaggio contiene testo segnaposto che i destinatari vedranno. Vuoi modificarlo prima di inviarlo?",
+      "found": "Segnaposto trovati",
+      "more": "e altri {count}",
+      "dont_ask_again": "Non chiedere più",
+      "send_anyway": "Invia comunque",
+      "back": "Torna alla modifica"
+    },
+    "placeholder_words": {
+      "before": [
+        "il tuo",
+        "la tua",
+        "i tuoi",
+        "le tue",
+        "il suo",
+        "la sua",
+        "inserisci",
+        "inserire",
+        "aggiungi",
+        "aggiungere",
+        "indica"
+      ],
+      "after": [],
+      "unfinished": []
+    },
     "recipient_add_contact": "Aggiungi ai contatti",
     "recipient_copy": "Copia indirizzo",
     "recipient_move_to": "Sposta in {field}",
@@ -820,6 +846,10 @@
         "ask_mobile": "Chiedi",
         "block_mobile": "Blocca"
       },
+      "placeholder_warning": {
+        "label": "Avviso segnaposto",
+        "description": "Chiedi conferma prima di inviare un messaggio che contiene ancora segnaposto come [TIME] o [Il tuo nome], campi del modello vuoti o testo incompleto come TODO o TBD."
+      },
       "plain_text_mode": {
         "description_mobile": "Scrivi e leggi solo in testo normale."
       },
diff --git a/locales/rn/ja.json b/locales/rn/ja.json
index bb6e0c9c..8aa12d2c 100644
--- a/locales/rn/ja.json
+++ b/locales/rn/ja.json
@@ -292,6 +292,30 @@
     "no_sent_folder": "送信済みフォルダーが見つかりません",
     "permission_camera": "写真を撮影するには、カメラへのアクセス許可が必要です。",
     "permission_photos": "画像を添付するには、写真ライブラリへのアクセス許可が必要です。",
+    "placeholder_warning": {
+      "title": "プレースホルダーを確認しますか？",
+      "message": "メッセージに受信者に表示されるプレースホルダーのテキストが含まれています。送信前に編集しますか？",
+      "found": "見つかったプレースホルダー",
+      "more": "ほか {count} 件",
+      "dont_ask_again": "今後は確認しない",
+      "send_anyway": "そのまま送信",
+      "back": "編集に戻る"
+    },
+    "placeholder_words": {
+      "before": [
+        "あなたの-",
+        "貴社の-",
+        "御社の-"
+      ],
+      "after": [
+        "-を入力",
+        "-を記入",
+        "-を挿入",
+        "-を追加",
+        "-を入れる"
+      ],
+      "unfinished": []
+    },
     "recipient_add_contact": "連絡先に追加",
     "recipient_copy": "アドレスをコピー",
     "recipient_move_to": "{field}に移動",
@@ -820,6 +844,10 @@
         "ask_mobile": "確認",
         "block_mobile": "ブロック"
       },
+      "placeholder_warning": {
+        "label": "プレースホルダーの警告",
+        "description": "[TIME] や [あなたの名前] などのプレースホルダー、空のテンプレート項目、TODO や TBD などの未完成のテキストが残っているメッセージを送信する前に確認します。"
+      },
       "plain_text_mode": {
         "description_mobile": "プレーンテキストのみで作成・閲覧します。"
       },
diff --git a/locales/rn/ko.json b/locales/rn/ko.json
index d3d768b7..2e9a1745 100644
--- a/locales/rn/ko.json
+++ b/locales/rn/ko.json
@@ -292,6 +292,28 @@
     "no_sent_folder": "보낸편지함을 찾을 수 없어요",
     "permission_camera": "사진을 찍으려면 카메라 권한이 필요해요.",
     "permission_photos": "이미지를 첨부하려면 사진 보관함 권한이 필요해요.",
+    "placeholder_warning": {
+      "title": "자리표시자를 확인할까요?",
+      "message": "메시지에 받는 사람에게 보이는 자리표시자 텍스트가 있습니다. 보내기 전에 수정할까요?",
+      "found": "찾은 자리표시자",
+      "more": "외 {count}개",
+      "dont_ask_again": "다시 묻지 않기",
+      "send_anyway": "그래도 보내기",
+      "back": "편집으로 돌아가기"
+    },
+    "placeholder_words": {
+      "before": [
+        "귀하의",
+        "당신의",
+        "고객님의"
+      ],
+      "after": [
+        "입력",
+        "삽입",
+        "추가"
+      ],
+      "unfinished": []
+    },
     "recipient_add_contact": "연락처에 추가",
     "recipient_copy": "주소 복사",
     "recipient_move_to": "{field}(으)로 이동",
@@ -820,6 +842,10 @@
         "ask_mobile": "묻기",
         "block_mobile": "차단"
       },
+      "placeholder_warning": {
+        "label": "자리표시자 경고",
+        "description": "[TIME]이나 [귀하의 이름] 같은 자리표시자, 비어 있는 템플릿 필드, TODO나 TBD 같은 미완성 텍스트가 남아 있는 메시지를 보내기 전에 확인을 요청합니다."
+      },
       "plain_text_mode": {
         "description_mobile": "일반 텍스트로만 작성하고 읽어요."
       },
diff --git a/locales/rn/lv.json b/locales/rn/lv.json
index 10c44956..1d0def7a 100644
--- a/locales/rn/lv.json
+++ b/locales/rn/lv.json
@@ -292,6 +292,29 @@
     "no_sent_folder": "Mape Nosūtītie nav atrasta",
     "permission_camera": "Lai uzņemtu fotoattēlu, nepieciešama kameras atļauja.",
     "permission_photos": "Lai pievienotu attēlus, nepieciešama fotoattēlu bibliotēkas atļauja.",
+    "placeholder_warning": {
+      "title": "Pārbaudīt vietturus?",
+      "message": "Ziņā ir viettura teksts, ko redzēs adresāti. Vai rediģēt to pirms sūtīšanas?",
+      "found": "Atrastie vietturi",
+      "more": "un vēl {count}",
+      "dont_ask_again": "Vairs nejautāt",
+      "send_anyway": "Sūtīt tik un tā",
+      "back": "Atpakaļ pie rediģēšanas"
+    },
+    "placeholder_words": {
+      "before": [
+        "jūsu",
+        "tavs",
+        "tava",
+        "ievadiet",
+        "ierakstiet",
+        "ievietojiet",
+        "pievienojiet",
+        "norādiet"
+      ],
+      "after": [],
+      "unfinished": []
+    },
     "recipient_add_contact": "Pievienot kontaktpersonām",
     "recipient_copy": "Kopēt adresi",
     "recipient_move_to": "Pārvietot uz lauku {field}",
@@ -820,6 +843,10 @@
         "ask_mobile": "Jautāt",
         "block_mobile": "Bloķēt"
       },
+      "placeholder_warning": {
+        "label": "Brīdinājums par vietturiem",
+        "description": "Pieprasīt apstiprinājumu pirms tādas ziņas sūtīšanas, kurā vēl ir vietturi, piemēram, [TIME] vai [Jūsu vārds], tukši veidnes lauki vai nepabeigts teksts, piemēram, TODO vai TBD."
+      },
       "plain_text_mode": {
         "description_mobile": "Rakstīt un lasīt tikai vienkāršā tekstā."
       },
diff --git a/locales/rn/mn.json b/locales/rn/mn.json
index 96eced5f..2096217a 100644
--- a/locales/rn/mn.json
+++ b/locales/rn/mn.json
@@ -292,6 +292,25 @@
     "no_sent_folder": "Илгээсэн хавтас олдсонгүй",
     "permission_camera": "Зураг авахын тулд камерын зөвшөөрөл шаардлагатай.",
     "permission_photos": "Зураг хавсаргахын тулд зургийн сангийн зөвшөөрөл шаардлагатай.",
+    "placeholder_warning": {
+      "title": "Орлуулагч текстийг шалгах уу?",
+      "message": "Таны зурваст хүлээн авагчид харагдах орлуулагч текст байна. Илгээхээс өмнө засах уу?",
+      "found": "Олдсон орлуулагч текст",
+      "more": "болон өөр {count}",
+      "dont_ask_again": "Дахиж битгий асуу",
+      "send_anyway": "Ямар ч байсан илгээнэ үү",
+      "back": "Засварлах руу буцах"
+    },
+    "placeholder_words": {
+      "before": [
+        "таны",
+        "чиний"
+      ],
+      "after": [
+        "оруулна уу"
+      ],
+      "unfinished": []
+    },
     "recipient_add_contact": "Харилцагчдад нэмэх",
     "recipient_copy": "Хаягийг хуулах",
     "recipient_move_to": "\"{field}\" талбар руу зөөх",
@@ -820,6 +839,10 @@
         "ask_mobile": "Асуух",
         "block_mobile": "Блоклох"
       },
+      "placeholder_warning": {
+        "label": "Орлуулагч текстийн анхааруулга",
+        "description": "[TIME] эсвэл [Таны нэр] зэрэг орлуулагч текст, хоосон загварын талбар, эсвэл TODO, TBD зэрэг дуусаагүй текст үлдсэн мессеж илгээхээс өмнө баталгаажуулахыг хүс."
+      },
       "plain_text_mode": {
         "description_mobile": "Зөвхөн энгийн текстээр бичих, унших."
       },
diff --git a/locales/rn/nb.json b/locales/rn/nb.json
index 99e55e64..fa91a3af 100644
--- a/locales/rn/nb.json
+++ b/locales/rn/nb.json
@@ -292,6 +292,27 @@
     "no_sent_folder": "Fant ingen Sendt-mappe",
     "permission_camera": "Du må gi tilgang til kameraet for å ta et bilde.",
     "permission_photos": "Du må gi tilgang til bildebiblioteket for å legge ved bilder.",
+    "placeholder_warning": {
+      "title": "Sjekke plassholdere?",
+      "message": "Meldingen har plassholdertekst som mottakerne vil se. Vil du redigere den før du sender?",
+      "found": "Plassholdere som ble funnet",
+      "more": "og {count} til",
+      "dont_ask_again": "Ikke spør igjen",
+      "send_anyway": "Send likevel",
+      "back": "Tilbake til redigering"
+    },
+    "placeholder_words": {
+      "before": [
+        "din",
+        "ditt",
+        "dine",
+        "sett inn",
+        "legg til",
+        "skriv"
+      ],
+      "after": [],
+      "unfinished": []
+    },
     "recipient_add_contact": "Legg til som kontakt",
     "recipient_copy": "Kopier adressen",
     "recipient_move_to": "Flytt til {field}",
@@ -820,6 +841,10 @@
         "ask_mobile": "Spør",
         "block_mobile": "Blokker"
       },
+      "placeholder_warning": {
+        "label": "Advarsel om plassholdere",
+        "description": "Be om bekreftelse før du sender en melding som fortsatt har plassholdere som [TIME] eller [Ditt navn], tomme malfelt eller uferdig tekst som TODO eller TBD."
+      },
       "plain_text_mode": {
         "description_mobile": "Skriv og les bare ren tekst."
       },
diff --git a/locales/rn/nl.json b/locales/rn/nl.json
index 4033f650..1f791dfb 100644
--- a/locales/rn/nl.json
+++ b/locales/rn/nl.json
@@ -292,6 +292,30 @@
     "no_sent_folder": "Geen map Verzonden gevonden",
     "permission_camera": "Toestemming voor de camera is nodig om een foto te maken.",
     "permission_photos": "Toestemming voor de fotobibliotheek is nodig om afbeeldingen bij te voegen.",
+    "placeholder_warning": {
+      "title": "Tijdelijke aanduidingen controleren?",
+      "message": "Je bericht bevat tijdelijke tekst die ontvangers zullen zien. Wil je het bewerken voordat je het verzendt?",
+      "found": "Gevonden tijdelijke aanduidingen",
+      "more": "en nog {count}",
+      "dont_ask_again": "Niet meer vragen",
+      "send_anyway": "Toch verzenden",
+      "back": "Terug naar bewerken"
+    },
+    "placeholder_words": {
+      "before": [
+        "je",
+        "jouw",
+        "uw",
+        "voeg",
+        "vul"
+      ],
+      "after": [
+        "invoegen",
+        "invullen",
+        "toevoegen"
+      ],
+      "unfinished": []
+    },
     "recipient_add_contact": "Aan contacten toevoegen",
     "recipient_copy": "Adres kopiëren",
     "recipient_move_to": "Verplaatsen naar {field}",
@@ -820,6 +844,10 @@
         "ask_mobile": "Vragen",
         "block_mobile": "Blokkeren"
       },
+      "placeholder_warning": {
+        "label": "Waarschuwing bij tijdelijke aanduidingen",
+        "description": "Vraag om bevestiging voordat een bericht wordt verzonden dat nog tijdelijke aanduidingen bevat zoals [TIME] of [Uw naam], lege sjabloonvelden of onafgemaakte tekst zoals TODO of TBD."
+      },
       "plain_text_mode": {
         "description_mobile": "Alleen in platte tekst opstellen en lezen."
       },
diff --git a/locales/rn/pl.json b/locales/rn/pl.json
index f28262cf..4110ae81 100644
--- a/locales/rn/pl.json
+++ b/locales/rn/pl.json
@@ -292,6 +292,30 @@
     "no_sent_folder": "Nie znaleziono folderu Wysłane",
     "permission_camera": "Aby zrobić zdjęcie, potrzebny jest dostęp do aparatu.",
     "permission_photos": "Aby załączać obrazy, potrzebny jest dostęp do galerii zdjęć.",
+    "placeholder_warning": {
+      "title": "Sprawdzić symbole zastępcze?",
+      "message": "Wiadomość zawiera tekst zastępczy, który zobaczą odbiorcy. Czy chcesz go poprawić przed wysłaniem?",
+      "found": "Znalezione symbole zastępcze",
+      "more": "i jeszcze {count}",
+      "dont_ask_again": "Nie pytaj ponownie",
+      "send_anyway": "Wyślij mimo to",
+      "back": "Wróć do edycji"
+    },
+    "placeholder_words": {
+      "before": [
+        "twoje",
+        "twój",
+        "twoja",
+        "pana",
+        "pani",
+        "wstaw",
+        "wpisz",
+        "dodaj",
+        "podaj"
+      ],
+      "after": [],
+      "unfinished": []
+    },
     "recipient_add_contact": "Dodaj do kontaktów",
     "recipient_copy": "Kopiuj adres",
     "recipient_move_to": "Przenieś do pola {field}",
@@ -820,6 +844,10 @@
         "ask_mobile": "Pytaj",
         "block_mobile": "Blokuj"
       },
+      "placeholder_warning": {
+        "label": "Ostrzeżenie o symbolach zastępczych",
+        "description": "Poproś o potwierdzenie przed wysłaniem wiadomości, która wciąż zawiera symbole zastępcze, takie jak [TIME] lub [Twoje imię], puste pola szablonu albo niedokończony tekst, taki jak TODO lub TBD."
+      },
       "plain_text_mode": {
         "description_mobile": "Twórz i czytaj wiadomości tylko jako zwykły tekst."
       },
diff --git a/locales/rn/pt.json b/locales/rn/pt.json
index 904d72a1..9dfe4dba 100644
--- a/locales/rn/pt.json
+++ b/locales/rn/pt.json
@@ -292,6 +292,33 @@
     "no_sent_folder": "Nenhuma pasta Enviados encontrada",
     "permission_camera": "É necessária permissão da câmera para tirar uma foto.",
     "permission_photos": "É necessária permissão da galeria de fotos para anexar imagens.",
+    "placeholder_warning": {
+      "title": "Verificar marcadores?",
+      "message": "A mensagem tem texto de marcador que os destinatários vão ver. Quer editá-la antes de enviar?",
+      "found": "Marcadores encontrados",
+      "more": "e mais {count}",
+      "dont_ask_again": "Não perguntar novamente",
+      "send_anyway": "Enviar mesmo assim",
+      "back": "Voltar à edição"
+    },
+    "placeholder_words": {
+      "before": [
+        "seu",
+        "sua",
+        "seus",
+        "suas",
+        "teu",
+        "tua",
+        "inserir",
+        "insira",
+        "adicionar",
+        "adicione",
+        "digite",
+        "informe"
+      ],
+      "after": [],
+      "unfinished": []
+    },
     "recipient_add_contact": "Adicionar aos contatos",
     "recipient_copy": "Copiar endereço",
     "recipient_move_to": "Mover para {field}",
@@ -820,6 +847,10 @@
         "ask_mobile": "Perguntar",
         "block_mobile": "Bloquear"
       },
+      "placeholder_warning": {
+        "label": "Aviso de marcadores",
+        "description": "Pedir confirmação antes de enviar uma mensagem que ainda tem marcadores como [TIME] ou [Seu nome], campos de modelo vazios ou texto inacabado como TODO ou TBD."
+      },
       "plain_text_mode": {
         "description_mobile": "Escrever e ler apenas em texto simples."
       },
diff --git a/locales/rn/ro.json b/locales/rn/ro.json
index 6cab3dc2..7ee57d75 100644
--- a/locales/rn/ro.json
+++ b/locales/rn/ro.json
@@ -292,6 +292,30 @@
     "no_sent_folder": "Nu s-a găsit folderul Trimise",
     "permission_camera": "Este necesară permisiunea pentru cameră pentru a face o fotografie.",
     "permission_photos": "Este necesară permisiunea pentru galeria foto pentru a atașa imagini.",
+    "placeholder_warning": {
+      "title": "Verificați substituenții?",
+      "message": "Mesajul conține text substituent pe care destinatarii îl vor vedea. Doriți să-l editați înainte de trimitere?",
+      "found": "Substituenți găsiți",
+      "more": "și încă {count}",
+      "dont_ask_again": "Nu mai întreba",
+      "send_anyway": "Trimite oricum",
+      "back": "Înapoi la editare"
+    },
+    "placeholder_words": {
+      "before": [
+        "introduceți",
+        "inserați",
+        "adăugați",
+        "completați"
+      ],
+      "after": [
+        "tău",
+        "ta",
+        "dvs.",
+        "dumneavoastră"
+      ],
+      "unfinished": []
+    },
     "recipient_add_contact": "Adaugă la contacte",
     "recipient_copy": "Copiați adresa",
     "recipient_move_to": "Mutați la {field}",
@@ -820,6 +844,10 @@
         "ask_mobile": "Întrebați",
         "block_mobile": "Blocați"
       },
+      "placeholder_warning": {
+        "label": "Avertisment pentru substituenți",
+        "description": "Cere confirmare înainte de a trimite un mesaj care încă are substituenți precum [TIME] sau [Numele tău], câmpuri de șablon goale sau text neterminat precum TODO sau TBD."
+      },
       "plain_text_mode": {
         "description_mobile": "Scrieți și citiți numai în text simplu."
       },
diff --git a/locales/rn/ru.json b/locales/rn/ru.json
index abf34836..47716fa5 100644
--- a/locales/rn/ru.json
+++ b/locales/rn/ru.json
@@ -292,6 +292,33 @@
     "no_sent_folder": "Папка «Отправленные» не найдена",
     "permission_camera": "Чтобы сделать фото, нужен доступ к камере.",
     "permission_photos": "Чтобы прикреплять изображения, нужен доступ к фотогалерее.",
+    "placeholder_warning": {
+      "title": "Проверить заполнители?",
+      "message": "В письме есть текст-заполнитель, который увидят получатели. Отредактировать его перед отправкой?",
+      "found": "Найденные заполнители",
+      "more": "и ещё {count}",
+      "dont_ask_again": "Больше не спрашивать",
+      "send_anyway": "Отправить всё равно",
+      "back": "Вернуться к редактированию"
+    },
+    "placeholder_words": {
+      "before": [
+        "ваше",
+        "ваш",
+        "ваша",
+        "ваши",
+        "твоё",
+        "твое",
+        "твой",
+        "твоя",
+        "вставьте",
+        "укажите",
+        "введите",
+        "добавьте"
+      ],
+      "after": [],
+      "unfinished": []
+    },
     "recipient_add_contact": "Добавить в контакты",
     "recipient_copy": "Копировать адрес",
     "recipient_move_to": "Переместить в «{field}»",
@@ -820,6 +847,10 @@
         "ask_mobile": "Спрашивать",
         "block_mobile": "Блокировать"
       },
+      "placeholder_warning": {
+        "label": "Предупреждение о заполнителях",
+        "description": "Запрашивать подтверждение перед отправкой письма, в котором остались заполнители вроде [TIME] или [Ваше имя], пустые поля шаблона или незаконченный текст вроде TODO или TBD."
+      },
       "plain_text_mode": {
         "description_mobile": "Писать и читать письма только в виде простого текста."
       },
diff --git a/locales/rn/sk.json b/locales/rn/sk.json
index f360b4a8..8ceabca5 100644
--- a/locales/rn/sk.json
+++ b/locales/rn/sk.json
@@ -292,6 +292,29 @@
     "no_sent_folder": "Priečinok Odoslané sa nenašiel",
     "permission_camera": "Na odfotenie je potrebné povolenie pre fotoaparát.",
     "permission_photos": "Na priloženie obrázkov je potrebné povolenie pre knižnicu fotiek.",
+    "placeholder_warning": {
+      "title": "Skontrolovať zástupné texty?",
+      "message": "Vaša správa obsahuje zástupný text, ktorý uvidia príjemcovia. Chcete ju pred odoslaním upraviť?",
+      "found": "Nájdené zástupné texty",
+      "more": "a ďalšie ({count})",
+      "dont_ask_again": "Znova sa nepýtať",
+      "send_anyway": "Odoslať aj tak",
+      "back": "Späť na úpravu"
+    },
+    "placeholder_words": {
+      "before": [
+        "vaše",
+        "váš",
+        "vaša",
+        "tvoje",
+        "vložte",
+        "doplňte",
+        "zadajte",
+        "uveďte"
+      ],
+      "after": [],
+      "unfinished": []
+    },
     "recipient_add_contact": "Pridať do kontaktov",
     "recipient_copy": "Kopírovať adresu",
     "recipient_move_to": "Presunúť do poľa {field}",
@@ -820,6 +843,10 @@
         "ask_mobile": "Pýtať sa",
         "block_mobile": "Blokovať"
       },
+      "placeholder_warning": {
+        "label": "Upozornenie na zástupné texty",
+        "description": "Pred odoslaním správy, ktorá ešte obsahuje zástupné texty ako [TIME] alebo [Vaše meno], prázdne polia šablóny alebo nedokončený text ako TODO či TBD, požiadať o potvrdenie."
+      },
       "plain_text_mode": {
         "description_mobile": "Písať a čítať iba v obyčajnom texte."
       },
diff --git a/locales/rn/tr.json b/locales/rn/tr.json
index 58ea6bcf..680a1923 100644
--- a/locales/rn/tr.json
+++ b/locales/rn/tr.json
@@ -292,6 +292,31 @@
     "no_sent_folder": "Gönderilenler klasörü bulunamadı",
     "permission_camera": "Fotoğraf çekmek için kamera izni gerekiyor.",
     "permission_photos": "Görsel eklemek için fotoğraf arşivi izni gerekiyor.",
+    "placeholder_warning": {
+      "title": "Yer tutucular kontrol edilsin mi?",
+      "message": "İletinizde alıcıların göreceği yer tutucu metin var. Göndermeden önce düzenlemek ister misiniz?",
+      "found": "Bulunan yer tutucular",
+      "more": "ve {count} tane daha",
+      "dont_ask_again": "Bir daha sorma",
+      "send_anyway": "Yine de gönder",
+      "back": "Düzenlemeye dön"
+    },
+    "placeholder_words": {
+      "before": [
+        "şirketinizin",
+        "buraya"
+      ],
+      "after": [
+        "ekleyin",
+        "girin",
+        "yazın",
+        "-ınız",
+        "-iniz",
+        "-unuz",
+        "-ünüz"
+      ],
+      "unfinished": []
+    },
     "recipient_add_contact": "Kişilere ekle",
     "recipient_copy": "Adresi kopyala",
     "recipient_move_to": "{field} alanına taşı",
@@ -820,6 +845,10 @@
         "ask_mobile": "Sor",
         "block_mobile": "Engelle"
       },
+      "placeholder_warning": {
+        "label": "Yer tutucu uyarısı",
+        "description": "Hâlâ [TIME] veya [Adınız] gibi yer tutucular, boş şablon alanları ya da TODO veya TBD gibi bitmemiş metin içeren bir ileti gönderilmeden önce onay iste."
+      },
       "plain_text_mode": {
         "description_mobile": "Yalnızca düz metin olarak yazın ve okuyun."
       },
diff --git a/locales/rn/uk.json b/locales/rn/uk.json
index 11062614..6b9479fd 100644
--- a/locales/rn/uk.json
+++ b/locales/rn/uk.json
@@ -292,6 +292,32 @@
     "no_sent_folder": "Папку «Надіслані» не знайдено",
     "permission_camera": "Щоб зробити фото, потрібен доступ до камери.",
     "permission_photos": "Щоб вкладати зображення, потрібен доступ до фотогалереї.",
+    "placeholder_warning": {
+      "title": "Перевірити заповнювачі?",
+      "message": "У листі є текст-заповнювач, який побачать одержувачі. Відредагувати його перед надсиланням?",
+      "found": "Знайдені заповнювачі",
+      "more": "і ще {count}",
+      "dont_ask_again": "Більше не запитувати",
+      "send_anyway": "Все одно надішліть",
+      "back": "Назад до редагування"
+    },
+    "placeholder_words": {
+      "before": [
+        "ваше",
+        "ваш",
+        "ваша",
+        "ваші",
+        "твоє",
+        "твій",
+        "твоя",
+        "вставте",
+        "вкажіть",
+        "введіть",
+        "додайте"
+      ],
+      "after": [],
+      "unfinished": []
+    },
     "recipient_add_contact": "Додати до контактів",
     "recipient_copy": "Копіювати адресу",
     "recipient_move_to": "Перемістити в «{field}»",
@@ -820,6 +846,10 @@
         "ask_mobile": "Питати",
         "block_mobile": "Блокувати"
       },
+      "placeholder_warning": {
+        "label": "Попередження про заповнювачі",
+        "description": "Запитувати підтвердження перед надсиланням листа, у якому лишилися заповнювачі на кшталт [TIME] або [Ваше ім’я], порожні поля шаблону чи незавершений текст на кшталт TODO або TBD."
+      },
       "plain_text_mode": {
         "description_mobile": "Писати й читати листи лише як простий текст."
       },
diff --git a/locales/rn/zh-TW.json b/locales/rn/zh-TW.json
index f6d92625..5b4f4db2 100644
--- a/locales/rn/zh-TW.json
+++ b/locales/rn/zh-TW.json
@@ -292,6 +292,29 @@
     "no_sent_folder": "找不到寄件備份信件匣",
     "permission_camera": "需要相機權限才能拍照。",
     "permission_photos": "需要相片圖庫權限才能附加圖片。",
+    "placeholder_warning": {
+      "title": "檢查預留位置？",
+      "message": "你的郵件中有收件者會看到的預留位置文字。要在傳送前編輯嗎？",
+      "found": "找到的預留位置",
+      "more": "以及另外 {count} 個",
+      "dont_ask_again": "不再提示",
+      "send_anyway": "仍然傳送",
+      "back": "繼續編輯"
+    },
+    "placeholder_words": {
+      "before": [
+        "您的-",
+        "你的-",
+        "貴公司-",
+        "插入-",
+        "輸入-",
+        "填寫-",
+        "新增-",
+        "在此-"
+      ],
+      "after": [],
+      "unfinished": []
+    },
     "recipient_add_contact": "新增至聯絡人",
     "recipient_copy": "複製地址",
     "recipient_move_to": "移至{field}",
@@ -820,6 +843,10 @@
         "ask_mobile": "詢問",
         "block_mobile": "封鎖"
       },
+      "placeholder_warning": {
+        "label": "預留位置提醒",
+        "description": "傳送仍含有預留位置（如 [TIME] 或 [您的姓名]）、空白範本欄位或未完成文字（如 TODO 或 TBD）的郵件前請求確認。"
+      },
       "plain_text_mode": {
         "description_mobile": "僅以純文字撰寫與閱讀。"
       },
diff --git a/locales/rn/zh.json b/locales/rn/zh.json
index 57166cb1..586df249 100644
--- a/locales/rn/zh.json
+++ b/locales/rn/zh.json
@@ -292,6 +292,29 @@
     "no_sent_folder": "未找到“已发送”文件夹",
     "permission_camera": "需要相机权限才能拍照。",
     "permission_photos": "需要相册权限才能附加图片。",
+    "placeholder_warning": {
+      "title": "检查占位符？",
+      "message": "你的邮件中有收件人会看到的占位符文本。要在发送前编辑吗？",
+      "found": "找到的占位符",
+      "more": "以及另外 {count} 个",
+      "dont_ask_again": "不再提示",
+      "send_anyway": "仍然发送",
+      "back": "返回编辑"
+    },
+    "placeholder_words": {
+      "before": [
+        "您的-",
+        "你的-",
+        "贵公司-",
+        "插入-",
+        "输入-",
+        "填写-",
+        "添加-",
+        "在此-"
+      ],
+      "after": [],
+      "unfinished": []
+    },
     "recipient_add_contact": "添加到联系人",
     "recipient_copy": "复制地址",
     "recipient_move_to": "移至{field}",
@@ -820,6 +843,10 @@
         "ask_mobile": "询问",
         "block_mobile": "阻止"
       },
+      "placeholder_warning": {
+        "label": "占位符提醒",
+        "description": "发送仍含有占位符（如 [TIME] 或 [您的姓名]）、空白模板字段或未完成文本（如 TODO 或 TBD）的邮件前请求确认。"
+      },
       "plain_text_mode": {
         "description_mobile": "仅以纯文本撰写和阅读。"
       },
diff --git a/src/components/settings/ComposingSettings.tsx b/src/components/settings/ComposingSettings.tsx
index a1581101..ca93aca6 100644
--- a/src/components/settings/ComposingSettings.tsx
+++ b/src/components/settings/ComposingSettings.tsx
@@ -26,6 +26,7 @@ export function ComposingSettings() {
   const signatureSeparatorEnabled = useSettingsStore((s) => s.signatureSeparatorEnabled);
   const requestReadReceiptDefault = useSettingsStore((s) => s.requestReadReceiptDefault);
   const emptySubjectWarningEnabled = useSettingsStore((s) => s.emptySubjectWarningEnabled);
+  const placeholderWarningEnabled = useSettingsStore((s) => s.placeholderWarningEnabled);
   const autoSaveDraftInterval = useSettingsStore((s) => s.autoSaveDraftInterval);
   const subAddressDelimiter = useSettingsStore((s) => s.subAddressDelimiter);
   const updateSetting = useSettingsStore((s) => s.updateSetting);
@@ -141,6 +142,13 @@ export function ComposingSettings() {
         <ToggleSwitch checked={emptySubjectWarningEnabled} onChange={(v) => updateSetting('emptySubjectWarningEnabled', v)} />
       </SettingItem>
 
+      <SettingItem
+        label={t('settings.email_behavior.placeholder_warning.label', 'Placeholder warning')}
+        description={t('settings.email_behavior.placeholder_warning.description', 'Ask for confirmation before sending a message that still has placeholders like [TIME] or [Your Name], template fields left empty, or unfinished text like TODO or TBD.')}
+      >
+        <ToggleSwitch checked={placeholderWarningEnabled} onChange={(v) => updateSetting('placeholderWarningEnabled', v)} />
+      </SettingItem>
+
       <View style={styles.subBlock}>
         <Text style={styles.subLabel}>{t('settings.email_behavior.signature_position.label', "Signature Position")}</Text>
         <Text style={styles.subDescription}>
diff --git a/src/lib/__tests__/placeholder-check.test.ts b/src/lib/__tests__/placeholder-check.test.ts
new file mode 100644
index 00000000..32ff0515
--- /dev/null
+++ b/src/lib/__tests__/placeholder-check.test.ts
@@ -0,0 +1,184 @@
+import { describe, it, expect } from 'vitest';
+import { SUPPORTED_LOCALES } from '../../i18n';
+import {
+  findUnfilledPlaceholders, placeholderWordsFor, unfilledPlaceholdersInMessage, type PlaceholderWords,
+} from '../placeholder-check';
+import { SIGNATURE_RANGE_MARKER } from '../signature-utils';
+
+// Ported from the webmail's lib/__tests__/placeholder-check.test.ts. The words
+// come from the RN overlays (locales/rn/<lang>.json) until the vendored
+// catalogs carry them.
+const locales = SUPPORTED_LOCALES.map((l) => l.code as string);
+
+function wordsOf(locale: string): PlaceholderWords {
+  return placeholderWordsFor(locale).at(-1)!;
+}
+
+// What the composer passes: English and the UI language.
+const withUi = (locale: string) => placeholderWordsFor(locale);
+const EN = withUi('en');
+const ALL = locales.map(wordsOf);
+
+describe('findUnfilledPlaceholders', () => {
+  it('finds template placeholders in the subject and the body', () => {
+    expect(findUnfilledPlaceholders('Follow-up: {{subject}}', 'Hi {{ recipient_name }},')).toEqual([
+      '{{subject}}',
+      '{{ recipient_name }}',
+    ]);
+  });
+
+  it('finds upper-case fill-ins in brackets', () => {
+    expect(findUnfilledPlaceholders('', 'See you at [TIME]. It costs [PRICE] per [UNIT_NAME].'))
+      .toEqual(['[TIME]', '[PRICE]', '[UNIT_NAME]']);
+    expect(findUnfilledPlaceholders('', 'Best regards, [YOUR NAME]')).toEqual(['[YOUR NAME]']);
+    expect(findUnfilledPlaceholders('', 'Treffpunkt: [ÜBERGABEORT]')).toEqual(['[ÜBERGABEORT]']);
+  });
+
+  it('finds fill-ins that ask the sender to write something', () => {
+    expect(findUnfilledPlaceholders('', 'Best regards,\n[Your Name]\n[Insert date]', EN)).toEqual([
+      '[Your Name]',
+      '[Insert date]',
+    ]);
+    expect(findUnfilledPlaceholders('', 'Viele Grüße\n[Ihr Name], [Datum einfügen]', withUi('de'))).toEqual([
+      '[Ihr Name]',
+      '[Datum einfügen]',
+    ]);
+  });
+
+  it.each([
+    ['ar', '[أدخل الاسم]'],
+    ['ca', '[El teu nom]'],
+    ['cs', '[Vaše jméno]'],
+    ['da', '[Dit navn]'],
+    ['de', '[Unterschrift eintragen]'],
+    ['es', '[Tu nombre]'],
+    ['es', '[Inserte la fecha]'],
+    ['fa', '[نام شما]'],
+    ['fr', '[Votre nom]'],
+    ['fr', '[Insérer la date]'],
+    ['he', '[השם שלך]'],
+    ['hu', '[Az Ön neve]'],
+    ['it', '[Il tuo nome]'],
+    ['it', '[Inserisci la data]'],
+    ['ja', '[あなたの名前]'],
+    ['ja', '［会社名を入力］'],
+    ['ko', '[귀하의 이름]'],
+    ['ko', '[날짜 입력]'],
+    ['lv', '[Jūsu vārds]'],
+    ['mn', '[Таны нэр]'],
+    ['nb', '[Ditt navn]'],
+    ['nl', '[Uw naam]'],
+    ['nl', '[Datum invullen]'],
+    ['pl', '[Twoje imię]'],
+    ['pt', '[Seu nome]'],
+    ['ro', '[Numele tău]'],
+    ['ru', '[Ваше имя]'],
+    ['ru', '[Укажите дату]'],
+    ['sk', '[Vaše meno]'],
+    ['tr', '[Adınız]'],
+    ['tr', '[Tarih ekleyin]'],
+    ['uk', '[Ваше ім’я]'],
+    ['zh', '[您的姓名]'],
+    ['zh', '【插入日期】'],
+    ['zh-TW', '[填寫公司名稱]'],
+  ])('finds a %s fill-in with that UI language: %s', (locale, fillIn) => {
+    expect(findUnfilledPlaceholders('', `Text ${fillIn} text`, withUi(locale))).toEqual([fillIn]);
+  });
+
+  it('checks only the languages it is given', () => {
+    expect(findUnfilledPlaceholders('', 'Cordialement, [Votre nom]', withUi('de'))).toEqual([]);
+    expect(findUnfilledPlaceholders('', 'Cordialement, [Votre nom]', withUi('fr'))).toEqual(['[Votre nom]']);
+  });
+
+  it('finds English fill-ins whatever the UI language', () => {
+    expect(findUnfilledPlaceholders('', 'Thanks, [Your Name]. TODO', withUi('ja'))).toEqual(['[Your Name]', 'TODO']);
+  });
+
+  it('skips word lists that are not lists of strings', () => {
+    const broken = [{ before: 'your' }, { before: [1, '', '-', null] }, null, { after: {} }] as unknown as PlaceholderWords[];
+    expect(findUnfilledPlaceholders('', '[Your Name] [TIME]', broken)).toEqual(['[TIME]']);
+  });
+
+  it('finds the circles that stand in for a name in Japanese and Korean', () => {
+    expect(findUnfilledPlaceholders('', '〇〇様\nお世話になっております。○○○ 님')).toEqual(['〇〇', '○○○']);
+  });
+
+  it('leaves bracketed words and headings in other languages alone', () => {
+    const text = [
+      '【重要】お知らせ 【通知】',
+      '[Votre] [Ваше] [您的]',
+      'Le [ton] juste. Vote [tu].',
+      'Siehe [Anlage 2] und [Kapitel 3].',
+      'Termin: ○ und ◯.',
+    ].join('\n');
+    expect(findUnfilledPlaceholders('', text, ALL)).toEqual([]);
+  });
+
+  it('finds unfinished-text markers', () => {
+    expect(findUnfilledPlaceholders('', 'The venue is TBD. TODO: add the agenda. Room XXX', EN)).toEqual([
+      'TBD',
+      'TODO',
+      'XXX',
+    ]);
+  });
+
+  it('reports a marker in brackets once', () => {
+    expect(findUnfilledPlaceholders('', 'Agenda: [TODO]', EN)).toEqual(['[TODO]']);
+  });
+
+  it('lists each placeholder once', () => {
+    expect(findUnfilledPlaceholders('{{name}}', 'Hi {{name}}, at [TIME] or [TIME]?')).toEqual([
+      '{{name}}',
+      '[TIME]',
+    ]);
+  });
+
+  it('leaves ordinary text alone', () => {
+    const text = [
+      'See footnote [1] and tick [x].',
+      'Option [A] is fine, so is [3D] and [2026].',
+      'I still have a todo list and the date is tba.',
+      'Read [the docs](https://example.com) and [Your account](https://example.com/me).',
+      'The mastodon handle is TODOS and the size is XXXL.',
+      'Signed, [Yours truly].',
+      'A {single} brace and {{}} are not placeholders.',
+    ].join('\n');
+    expect(findUnfilledPlaceholders('', text, ALL)).toEqual([]);
+  });
+
+  it('ignores bracket tags and markers in the subject', () => {
+    expect(findUnfilledPlaceholders('Re: [EXTERNAL] Venue TBD', 'Thanks!', ALL)).toEqual([]);
+  });
+});
+
+describe('placeholder words in the locale files', () => {
+  it.each(locales)('%s has lists of strings', (locale) => {
+    const words = wordsOf(locale) as Record<string, unknown>;
+    for (const key of ['before', 'after', 'unfinished']) {
+      expect(Array.isArray(words[key]), `${locale}: ${key} is not a list`).toBe(true);
+      for (const word of words[key] as unknown[]) {
+        expect(typeof word === 'string' && word.replace(/-/g, '').trim() !== '', `${locale}: ${JSON.stringify(word)}`).toBe(true);
+      }
+    }
+  });
+});
+
+describe('unfilledPlaceholdersInMessage', () => {
+  const signature = { name: 'Me', email: 'me@example.com', textSignature: 'Me\n[YOUR TITLE]', htmlSignature: '' };
+
+  it('leaves the embedded signature and the quoted original out', () => {
+    const body = '<p>See you at [TIME].</p>'
+      + `<p ${SIGNATURE_RANGE_MARKER}="separator">-- </p><p>Me, [YOUR TITLE]</p><p ${SIGNATURE_RANGE_MARKER}="end"></p>`
+      + '<blockquote><p>Please confirm [DATE]</p></blockquote>';
+    expect(unfilledPlaceholdersInMessage({
+      subject: 'Re: hello', body, plainTextMode: false, signature, words: EN,
+    })).toEqual(['[TIME]']);
+  });
+
+  it('leaves the plain text signature and quoted lines out', () => {
+    const body = 'See you at [TIME].\n\n-- \nMe\n[YOUR TITLE]\n\n> Please confirm [DATE]';
+    expect(unfilledPlaceholdersInMessage({
+      subject: '{{subject}}', body, plainTextMode: true, signature, words: EN,
+    })).toEqual(['{{subject}}', '[TIME]']);
+  });
+});
diff --git a/src/lib/placeholder-check.ts b/src/lib/placeholder-check.ts
new file mode 100644
index 00000000..33e19c67
--- /dev/null
+++ b/src/lib/placeholder-check.ts
@@ -0,0 +1,171 @@
+// Finds text the sender meant to replace before sending: template
+// placeholders, bracketed fill-ins that AI drafts and copied templates leave
+// behind, and markers like TODO. Port of the webmail's lib/placeholder-check.ts.
+
+import { getDictionary, isSupportedLocale } from '../i18n';
+import { extractUserAuthoredText } from './compose-html';
+import { getPlainTextSignature, stripEmbeddedSignature, type SignatureSource } from './signature-utils';
+
+// Template syntax, as in template-utils. Spaces inside the braces are allowed
+// because templates pasted from other tools often have them.
+const TEMPLATE_PLACEHOLDER = /\{\{\s*[\w.-]+\s*\}\}/g;
+
+// [TIME], [PRICE], [YOUR NAME]. Not followed by "(", which would make it a
+// Markdown link.
+const CAPS_BRACKET = /\[[\p{Lu}\d][\p{Lu}\d _./-]{0,28}[\p{Lu}\d]\](?!\()/gu;
+
+/**
+ * The words that mark a fill-in in one language. They live in each locale
+ * file under email_composer.placeholder_words, so a new translation brings
+ * its own.
+ *
+ * - `before` opens a fill-in: "your" in [Your name], "insert" in [Insert date].
+ * - `after` closes one, for languages that put the verb or "your" last:
+ *   "einfügen" in [Datum einfügen].
+ * - A "-" on the joining side means the word is written onto the next one
+ *   without a space: "您的-" for [您的姓名], "-ınız" for [Adınız].
+ * - `unfinished` are words in capitals that mark unfinished text, like TODO.
+ *   They match as written, so "todo" in a sentence does not count.
+ */
+export interface PlaceholderWords {
+  before?: unknown;
+  after?: unknown;
+  unfinished?: unknown;
+}
+
+const escapeRegExp = (s: string) => s.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
+const alternation = (words: string[]) => words.map(escapeRegExp).join('|');
+
+// The lists come from locale files that contributors edit, so anything that
+// is not a list of strings is skipped.
+function wordsOf(lists: PlaceholderWords[], key: keyof PlaceholderWords): string[] {
+  const words = new Set<string>();
+  for (const list of lists) {
+    const value = list?.[key];
+    if (!Array.isArray(value)) continue;
+    for (const word of value) {
+      if (typeof word === 'string' && word.replace(/-/g, '').trim()) words.add(word.trim());
+    }
+  }
+  return Array.from(words);
+}
+
+// Plain brackets, and the full-width and lenticular ones of CJK text.
+const OPEN = '[\\[［【]';
+const CLOSE = '[\\]］】]';
+const INNER = '[^\\[\\]［］【】\\n]';
+
+function promptBracketPattern(lists: PlaceholderWords[]): RegExp | null {
+  const before = wordsOf(lists, 'before');
+  const after = wordsOf(lists, 'after');
+  const branches: string[] = [];
+  const add = (words: string[], branch: (alt: string) => string) => {
+    if (words.length > 0) branches.push(branch(alternation(words)));
+  };
+  add(before.filter((w) => !w.endsWith('-')), (alt) => `(?:${alt})\\s${INNER}{1,40}`);
+  add(before.filter((w) => w.endsWith('-')).map((w) => w.slice(0, -1)), (alt) => `(?:${alt})${INNER}{1,40}`);
+  add(after.filter((w) => !w.startsWith('-')), (alt) => `${INNER}{1,40}\\s(?:${alt})`);
+  add(after.filter((w) => w.startsWith('-')).map((w) => w.slice(1)), (alt) => `${INNER}{1,40}(?:${alt})`);
+  if (branches.length === 0) return null;
+  return new RegExp(`${OPEN}(?:${branches.join('|')})${CLOSE}(?!\\()`, 'giu');
+}
+
+function unfinishedWordPattern(lists: PlaceholderWords[]): RegExp | null {
+  const words = wordsOf(lists, 'unfinished');
+  if (words.length === 0) return null;
+  return new RegExp(`(?<![\\p{L}\\d_])(?:${alternation(words)})(?![\\p{L}\\d_])`, 'gu');
+}
+
+// Japanese and Korean stand-ins for a name or number: 〇〇様, ○○○ 님. Signs
+// rather than words, so they are not in the locale files.
+const CIRCLE_MARKER = /[〇○◯]{2,}/gu;
+
+interface Match {
+  start: number;
+  end: number;
+  text: string;
+}
+
+function collect(text: string, patterns: RegExp[]): Match[] {
+  const matches: Match[] = [];
+  for (const pattern of patterns) {
+    for (const m of text.matchAll(pattern)) {
+      if (pattern === CAPS_BRACKET && (m[0].match(/\p{Lu}/gu)?.length ?? 0) < 2) continue;
+      const start = m.index ?? 0;
+      matches.push({ start, end: start + m[0].length, text: m[0] });
+    }
+  }
+  // "[TODO]" is a bracket and a word; keep the outer match only.
+  matches.sort((a, b) => a.start - b.start || b.end - a.end);
+  const kept: Match[] = [];
+  for (const match of matches) {
+    const last = kept[kept.length - 1];
+    if (last && match.start < last.end) continue;
+    kept.push(match);
+  }
+  return kept;
+}
+
+/**
+ * The unfilled placeholders in a message, each once, subject first. The
+ * subject is only checked for template placeholders: it often carries tags
+ * like [EXTERNAL] or words from the original message, which the sender did
+ * not write. `bodyText` should be the text the sender wrote, without quoted
+ * replies and the signature. `words` are the fill-in words of the languages
+ * to check (see PlaceholderWords).
+ */
+export function findUnfilledPlaceholders(subject: string, bodyText: string, words: PlaceholderWords[] = []): string[] {
+  const bodyPatterns = [TEMPLATE_PLACEHOLDER, CAPS_BRACKET, CIRCLE_MARKER];
+  const prompt = promptBracketPattern(words);
+  const unfinished = unfinishedWordPattern(words);
+  if (prompt) bodyPatterns.push(prompt);
+  if (unfinished) bodyPatterns.push(unfinished);
+  const found = [
+    ...collect(subject, [TEMPLATE_PLACEHOLDER]),
+    ...collect(bodyText, bodyPatterns),
+  ].map((m) => m.text);
+  return Array.from(new Set(found));
+}
+
+function placeholderWordsOf(dictionary: Record<string, unknown>): PlaceholderWords {
+  const composer = dictionary.email_composer as Record<string, unknown> | undefined;
+  const words = composer?.placeholder_words;
+  return words && typeof words === 'object' ? (words as PlaceholderWords) : {};
+}
+
+/**
+ * The fill-in words to check: the UI language's and English, since AI drafts
+ * and templates are often English whatever the UI language is.
+ */
+export function placeholderWordsFor(locale: string): PlaceholderWords[] {
+  const lists = [placeholderWordsOf(getDictionary('en'))];
+  if (locale !== 'en' && isSupportedLocale(locale)) lists.push(placeholderWordsOf(getDictionary(locale)));
+  return lists;
+}
+
+/**
+ * The unfilled placeholders of a message as the composer holds it: the body
+ * without its signature (a placeholder there would stop every message) and
+ * without the quoted original.
+ */
+export function unfilledPlaceholdersInMessage(message: {
+  subject: string;
+  body: string;
+  plainTextMode: boolean;
+  signature?: SignatureSource | null;
+  forwardedSeparator?: string;
+  words: PlaceholderWords[];
+}): string[] {
+  let authored: string;
+  if (message.plainTextMode) {
+    const signature = getPlainTextSignature(message.signature ?? undefined);
+    authored = signature ? message.body.split(signature).join('') : message.body;
+  } else {
+    authored = stripEmbeddedSignature(message.body);
+  }
+  const bodyText = extractUserAuthoredText(authored, {
+    plainTextMode: message.plainTextMode,
+    forwardedSeparator: message.forwardedSeparator,
+  });
+  return findUnfilledPlaceholders(message.subject, bodyText, message.words);
+}
diff --git a/src/lib/settings-search.ts b/src/lib/settings-search.ts
index fba469f1..47901d50 100644
--- a/src/lib/settings-search.ts
+++ b/src/lib/settings-search.ts
@@ -99,6 +99,7 @@ export const SETTINGS_SEARCH_PATHS: Record<SettingsTabId, string[]> = {
     'settings.email_behavior.plain_text_mode',
     'settings.email_behavior.request_read_receipt',
     'settings.email_behavior.empty_subject_warning',
+    'settings.email_behavior.placeholder_warning',
     'settings.email_behavior.signature_separator',
     'settings.email_behavior.signature_position',
     'settings.email_behavior.send_delay',
diff --git a/src/screens/ComposeScreen.tsx b/src/screens/ComposeScreen.tsx
index 572d29bb..764f6d24 100644
--- a/src/screens/ComposeScreen.tsx
+++ b/src/screens/ComposeScreen.tsx
@@ -66,6 +66,7 @@ import {
   findComposeIdentityId, findDraftIdentityId, resolveComposeAccountEmail, resolveReplyIdentity,
 } from '../lib/reply-identity';
 import { shouldBlockEditorRemoteImages } from '../lib/editor-html';
+import { placeholderWordsFor, unfilledPlaceholdersInMessage } from '../lib/placeholder-check';
 import {
   ComposerLoginMovedError, loginMovedFrom, uploadBytesForLogin, uploadFileForLogin,
 } from '../lib/compose-login';
@@ -482,6 +483,7 @@ export default function ComposeScreen({ route, navigation }: Props) {
   const signatureSeparatorEnabled = useSettingsStore((s) => s.signatureSeparatorEnabled);
   const requestReadReceiptDefault = useSettingsStore((s) => s.requestReadReceiptDefault);
   const emptySubjectWarningEnabled = useSettingsStore((s) => s.emptySubjectWarningEnabled);
+  const placeholderWarningEnabled = useSettingsStore((s) => s.placeholderWarningEnabled);
   const autoSaveDraftInterval = useSettingsStore((s) => s.autoSaveDraftInterval);
   const subAddressDelimiter = useSettingsStore((s) => s.subAddressDelimiter);
   const preferredIdentityIds = useSettingsStore((s) => s.preferredIdentityIds);
@@ -2049,6 +2051,54 @@ export default function ComposeScreen({ route, navigation }: Props) {
     });
   };
 
+  // Unfilled placeholders: template fields left as {{name}}, fill-ins like
+  // [TIME] from AI drafts, and markers like TODO (webmail
+  // lib/placeholder-check). The signature is left out, or a placeholder in
+  // it would stop every message. Asked once per placeholder: after "Send
+  // anyway" and a trip back to add an attachment, the same ones pass.
+  const confirmedPlaceholdersRef = React.useRef(new Set<string>());
+  const passesPlaceholderCheck = (body: string): Promise<boolean> => {
+    if (!placeholderWarningEnabled) return Promise.resolve(true);
+    const found = unfilledPlaceholdersInMessage({
+      subject,
+      body,
+      plainTextMode,
+      signature: signatureIdentity,
+      forwardedSeparator: quoteLabels.forwardedSeparator,
+      words: placeholderWordsFor(locale),
+    });
+    if (!found.some((p) => !confirmedPlaceholdersRef.current.has(p))) return Promise.resolve(true);
+    const SHOWN = 5;
+    const more = found.length > SHOWN
+      ? ` ${t('email_composer.placeholder_warning.more', 'and {count} more', { count: found.length - SHOWN })}`
+      : '';
+    const message = t(
+      'email_composer.placeholder_warning.message',
+      'Your message has placeholder text that recipients will see. Do you want to edit it before sending?',
+    );
+    const label = t('email_composer.placeholder_warning.found', 'Placeholders found');
+    return new Promise<boolean>((resolve) => {
+      Alert.alert(
+        t('email_composer.placeholder_warning.title', 'Check placeholders?'),
+        `${message}\n\n${label}: ${found.slice(0, SHOWN).join(', ')}${more}`,
+        [
+          { text: t('email_composer.placeholder_warning.back', 'Back to editing'), style: 'cancel', onPress: () => resolve(false) },
+          {
+            text: t('email_composer.placeholder_warning.dont_ask_again', "Don't ask again"),
+            onPress: () => { updateSetting('placeholderWarningEnabled', false); resolve(true); },
+          },
+          {
+            text: t('email_composer.placeholder_warning.send_anyway', 'Send anyway'),
+            onPress: () => {
+              for (const p of found) confirmedPlaceholdersRef.current.add(p);
+              resolve(true);
+            },
+          },
+        ],
+      );
+    });
+  };
+
   // Translate an absolute "send at" time into the HOLDFOR seconds the server
   // expects, clamping to what it actually supports. Returns null (and alerts)
   // when scheduling isn't possible so the caller can abort.
@@ -2198,6 +2248,7 @@ export default function ComposeScreen({ route, navigation }: Props) {
     }
 
     if (!(await passesEmptySubjectCheck())) return;
+    if (!(await passesPlaceholderCheck(plainTextMode ? plainBody : liveBodyHtml))) return;
     if (!(await passesAttachmentReminder(plainTextMode ? plainBody : liveBodyHtml))) return;
 
     // Autosave must not race the send: cancel a scheduled save and let an
diff --git a/src/stores/settings-store.ts b/src/stores/settings-store.ts
index 873b4cc5..efc755b8 100644
--- a/src/stores/settings-store.ts
+++ b/src/stores/settings-store.ts
@@ -173,6 +173,8 @@ interface PersistedSettings {
   requestReadReceiptDefault: boolean;
   // Confirm before sending a message without a subject (#684).
   emptySubjectWarningEnabled: boolean;
+  // Confirm before sending a message with unfilled placeholders like [TIME] or TODO.
+  placeholderWarningEnabled: boolean;
   // Draft autosave debounce, milliseconds.
   autoSaveDraftInterval: number;
   // Character separating user from tag (e.g. "user+tag@"), RFC 5233.
@@ -362,6 +364,7 @@ const DEFAULT_PERSISTED: PersistedSettings = {
   signatureSeparatorEnabled: true,
   requestReadReceiptDefault: false,
   emptySubjectWarningEnabled: true,
+  placeholderWarningEnabled: true,
   autoSaveDraftInterval: 60000,
   subAddressDelimiter: '+',
   preferredIdentityIds: {},