clean up language before suggesting (#9006)

src/view/com/composer/select-language/SuggestedLanguage.tsx

···
 import {useEffect, useState} from 'react'
 import {View} from 'react-native'
+import {parseLanguage} from '@atproto/api'
 import {msg, Trans} from '@lingui/macro'
 import {useLingui} from '@lingui/react'
 import lande from 'lande'
···
 
 export function SuggestedLanguage({
   text,
-  replyToLanguage,
+  replyToLanguage: replyToLanguageProp,
 }: {
   text: string
   replyToLanguage?: string
 }) {
+  const replyToLanguage = cleanUpLanguage(replyToLanguageProp)
   const [suggestedLanguage, setSuggestedLanguage] = useState<
     string | undefined
   >(text.length === 0 ? replyToLanguage : undefined)
···
   }
   return code3ToCode2Strict(lang)
 }
+
+function cleanUpLanguage(text: string | undefined): string | undefined {
+  if (!text) {
+    return undefined
+  }
+
+  return parseLanguage(text)?.language
+}