diff --git a/mobile/src/i18n/embedded-webview-copy.test.ts b/mobile/src/i18n/embedded-webview-copy.test.ts
index 5348120a620..64c50842eab 100644
--- a/mobile/src/i18n/embedded-webview-copy.test.ts
+++ b/mobile/src/i18n/embedded-webview-copy.test.ts
@@ -1,79 +1,34 @@
-import { afterEach, describe, expect, it } from 'vitest'
+import { describe, expect, it } from 'vitest'
 
-import {
-  buildMobileRichMarkdownEditorHtml,
-  escapeInjectedJavaScriptString
-} from '../components/mobile-rich-markdown-editor-html'
-import { buildTerminalWebViewHtml } from '../terminal/terminal-webview-html'
 import { escapeEmbeddedHtmlCopy } from './embedded-webview-copy'
-import { mobileI18n } from './mobile-i18n'
 
-const INITIAL_LOCALE = mobileI18n.language
-
-afterEach(async () => {
-  await mobileI18n.changeLanguage(INITIAL_LOCALE)
-})
-
-describe('embedded WebView copy', () => {
-  it('escapes translated HTML text and attributes', () => {
+// The WebView-injection call sites are not localized yet, so this covers the
+// primitive on its own. Extraction adds the cases that assert translated copy
+// reaches the rich-editor and terminal documents already escaped.
+describe('escapeEmbeddedHtmlCopy', () => {
+  it('escapes text and attribute delimiters', () => {
     expect(escapeEmbeddedHtmlCopy('<Copy "all" & more>')).toBe(
       '&lt;Copy &quot;all&quot; &amp; more&gt;'
     )
   })
 
-  it('injects localized rich-editor and terminal controls', async () => {
-    await mobileI18n.changeLanguage('es')
-
-    const editorHtml = buildMobileRichMarkdownEditorHtml()
-    expect(editorHtml).toContain('<html lang="es">')
-    expect(editorHtml).toContain('data-placeholder="Empieza a escribir..."')
-    expect(editorHtml).toContain('window.prompt("URL del enlace")')
-    expect(editorHtml).toContain('window.prompt("URL de la imagen")')
-    expect(editorHtml).toContain(`+ "Tarea" +`)
-
-    const terminalHtml = buildTerminalWebViewHtml()
-    expect(terminalHtml).toContain('<html lang="es">')
-    expect(terminalHtml).toContain('id="sel-menu-copy">Copiar</button>')
-    expect(terminalHtml).toContain('id="sel-menu-all">Seleccionar todo</button>')
+  it('neutralizes markup that would otherwise parse as an element', () => {
+    expect(escapeEmbeddedHtmlCopy('<img src=x onerror=alert(1)>')).toBe(
+      '&lt;img src=x onerror=alert(1)&gt;'
+    )
+    expect(escapeEmbeddedHtmlCopy('<b>Task & more</b>')).toBe('&lt;b&gt;Task &amp; more&lt;/b&gt;')
   })
 
-  it('escapes script-state delimiters in translated JavaScript strings', () => {
-    expect(escapeInjectedJavaScriptString('<!--<script>')).toBe('"\\u003c!--\\u003cscript>"')
+  it('escapes ampersands first so entities are not double-decoded', () => {
+    expect(escapeEmbeddedHtmlCopy('&lt;')).toBe('&amp;lt;')
   })
 
-  it('HTML-escapes rich-editor placeholders before insertHTML parses them', () => {
-    const codePlaceholder = mobileI18n.getResource(
-      'en',
-      'translation',
-      'richMarkdown.codePlaceholder'
-    )
-    const taskPlaceholder = mobileI18n.getResource(
-      'en',
-      'translation',
-      'richMarkdown.taskPlaceholder'
-    )
-    mobileI18n.addResource(
-      'en',
-      'translation',
-      'richMarkdown.codePlaceholder',
-      '<img src=x onerror=alert(1)>'
-    )
-    mobileI18n.addResource(
-      'en',
-      'translation',
-      'richMarkdown.taskPlaceholder',
-      '<b>Task & more</b>'
-    )
+  it('escapes the single quote that would close an attribute', () => {
+    expect(escapeEmbeddedHtmlCopy("it's")).toBe('it&#39;s')
+  })
 
-    try {
-      const editorHtml = buildMobileRichMarkdownEditorHtml()
-      expect(editorHtml).toContain('&lt;img src=x onerror=alert(1)&gt;')
-      expect(editorHtml).toContain('&lt;b&gt;Task &amp; more&lt;/b&gt;')
-      expect(editorHtml).not.toContain('<img src=x onerror=alert(1)>')
-      expect(editorHtml).not.toContain('<b>Task & more</b>')
-    } finally {
-      mobileI18n.addResource('en', 'translation', 'richMarkdown.codePlaceholder', codePlaceholder)
-      mobileI18n.addResource('en', 'translation', 'richMarkdown.taskPlaceholder', taskPlaceholder)
-    }
+  it('leaves copy without markup untouched', () => {
+    expect(escapeEmbeddedHtmlCopy('Seleccionar todo')).toBe('Seleccionar todo')
+    expect(escapeEmbeddedHtmlCopy('')).toBe('')
   })
 })
diff --git a/mobile/src/i18n/mobile-i18n.test.ts b/mobile/src/i18n/mobile-i18n.test.ts
index 86b0dd244c9..1a5ac971f04 100644
--- a/mobile/src/i18n/mobile-i18n.test.ts
+++ b/mobile/src/i18n/mobile-i18n.test.ts
@@ -83,9 +83,12 @@ describe('mobile i18n startup', () => {
     expect(mobileI18n.isInitialized).toBe(true)
   })
 
-  // A locale change restarts the app, so only the fallback and the active locale are
-  // ever needed. Registering all five would parse unused catalogs on every boot.
-  it('registers only the catalogs it has, not every supported locale', () => {
+  // Coverage, not a regression guard: with only en.json present, registering every
+  // supported locale produces the same result as registering the active one, so this
+  // cannot distinguish the two. It pins that a supported locale without a catalog is
+  // never registered. Extraction adds a second catalog, which is what finally makes
+  // the lazy path observable.
+  it('never registers a supported locale that has no catalog', () => {
     expect(mobileI18n.hasResourceBundle('en', 'translation')).toBe(true)
     for (const locale of ['es', 'ja', 'ko', 'zh'] satisfies MobileUiLocale[]) {
       expect(loadMobileLocaleCatalog(locale)).toBeUndefined()
