Replace lande with native language detection (#9974)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-authored-by: DS Boyce <260543580+ds-boyce@users.noreply.github.com>
Co-authored-by: Eric Bailey <git@esb.lol>

src/analytics/features/types.ts

@@ -14,7 +14,9 @@ export enum Features {
   GroupChatsEnable = 'group_chats:enable',
   GroupChatsHasBeenReleased = 'group_chats:has_been_released',
   DmsNewMessageComposerEnable = 'dms:new_message_composer:enable',
+  ComposerLanguageDetectionEnable = 'composer:language_detection:enable',
   KlipyGifProviderEnable = 'klipy_gif_provider:enable',
   PostGalleryEmbedEnable = 'post_gallery_embed:enable',
+
   AATest = 'aa-test',
 }

src/analytics/metrics/types.ts

@@ -800,6 +800,100 @@ export type Events = {
      */
     resultSourceLanguage: string
   }
+  'composer:language:suggestLanguage': {
+    os: Platform['OS']
+    /**
+     * The language we detected and suggested to the user as an override for the
+     * expected target language.
+     */
+    suggestedLanguage: string | undefined
+    /**
+     * This is the user's current composer languages, which are always defined.
+     */
+    currentTargetLanguages: string[]
+    /**
+     * The length of the text being translated. We assume shorter texts are
+     * more likely to have inaccurate translations.
+     */
+    textLength: number
+  }
+  'composer:language:acceptSuggestion': {
+    os: Platform['OS']
+    /**
+     * The language we detected and suggested to the user as an override for the
+     * expected target language.
+     */
+    suggestedLanguage: string | undefined
+    /**
+     * This is the user's current composer languages, which are always defined.
+     */
+    currentTargetLanguages: string[]
+    /**
+     * The length of the text being translated. We assume shorter texts are
+     * more likely to have inaccurate translations.
+     */
+    textLength: number
+  }
+  'composer:language:declineSuggestion': {
+    os: Platform['OS']
+    /**
+     * The language we detected and suggested to the user as an override for the
+     * expected target language.
+     */
+    suggestedLanguage: string | undefined
+    /**
+     * This is the user's current composer languages, which are always defined.
+     */
+    currentTargetLanguages: string[]
+    /**
+     * The length of the text being translated. We assume shorter texts are
+     * more likely to have inaccurate translations.
+     */
+    textLength: number
+  }
+  'composer:language:replyNudgeAccept': {
+    /**
+     * The language of the post the user is replying to.
+     */
+    replyToLanguage: string
+    /**
+     * This is the user's current composer languages, which are always defined.
+     */
+    currentTargetLanguages: string[]
+  }
+  'composer:language:replyNudgeDecline': {
+    /**
+     * The language of the post the user is replying to.
+     */
+    replyToLanguage: string
+    /**
+     * This is the user's current composer languages, which are always defined.
+     */
+    currentTargetLanguages: string[]
+  }
+  'composer:language:nudgeUser': {
+    os: Platform['OS']
+    /**
+     * The language we detected and suggested to the user as an override for the
+     * expected target language.
+     */
+    suggestedLanguage: string | undefined
+    /**
+     * This is the user's current composer languages, which are always defined.
+     */
+    currentTargetLanguages: string[]
+    /**
+     * The length of the text being translated. We assume shorter texts are
+     * more likely to have inaccurate translations.
+     */
+    textLength: number
+  }
+  'composer:language:langSelectorPressed': {
+    /**
+     * If the user was nudged by our language detection to update their language
+     */
+    wasNudged: boolean
+  }
 
   'postMenu:openMuteWordsDialog': {
     uri: string