Localize lang selectors according to the app language (#6207)

* Localize lang selectors according to the app language

* Explicitly ignore RangeError when translating locale names

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

@@ -48,7 +48,7 @@ export function SelectLangBtn() {
     function add(commaSeparatedLangCodes: string) {
       const langCodes = commaSeparatedLangCodes.split(',')
       const langName = langCodes
-        .map(code => codeToLanguageName(code))
+        .map(code => codeToLanguageName(code, langPrefs.appLanguage))
         .join(' + ')
 
       /*
@@ -108,7 +108,9 @@ export function SelectLangBtn() {
       accessibilityHint="">
       {postLanguagesPref.length > 0 ? (
         <Text type="lg-bold" style={[pal.link, styles.label]} numberOfLines={1}>
-          {postLanguagesPref.map(lang => codeToLanguageName(lang)).join(', ')}
+          {postLanguagesPref
+            .map(lang => codeToLanguageName(lang, langPrefs.appLanguage))
+            .join(', ')}
         </Text>
       ) : (
         <FontAwesomeIcon

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

@@ -49,37 +49,48 @@ export function SuggestedLanguage({text}: {text: string}) {
     return () => cancelIdle(idle)
   }, [text])
 
-  return suggestedLanguage &&
-    !toPostLanguages(langPrefs.postLanguage).includes(suggestedLanguage) ? (
-    <View style={[pal.border, styles.infoBar]}>
-      <FontAwesomeIcon
-        icon="language"
-        style={pal.text as FontAwesomeIconStyle}
-        size={24}
-      />
-      <Text style={[pal.text, s.flex1]}>
-        <Trans>
-          Are you writing in{' '}
-          <Text type="sm-bold" style={pal.text}>
-            {codeToLanguageName(suggestedLanguage)}
-          </Text>
-          ?
-        </Trans>
-      </Text>
+  if (
+    suggestedLanguage &&
+    !toPostLanguages(langPrefs.postLanguage).includes(suggestedLanguage)
+  ) {
+    const suggestedLanguageName = codeToLanguageName(
+      suggestedLanguage,
+      langPrefs.appLanguage,
+    )
 
-      <Button
-        type="default"
-        onPress={() => setLangPrefs.setPostLanguage(suggestedLanguage)}
-        accessibilityLabel={_(
-          msg`Change post language to ${codeToLanguageName(suggestedLanguage)}`,
-        )}
-        accessibilityHint="">
-        <Text type="button" style={[pal.link, s.fw600]}>
-          <Trans>Yes</Trans>
+    return (
+      <View style={[pal.border, styles.infoBar]}>
+        <FontAwesomeIcon
+          icon="language"
+          style={pal.text as FontAwesomeIconStyle}
+          size={24}
+        />
+        <Text style={[pal.text, s.flex1]}>
+          <Trans>
+            Are you writing in{' '}
+            <Text type="sm-bold" style={pal.text}>
+              {suggestedLanguageName}
+            </Text>
+            ?
+          </Trans>
         </Text>
-      </Button>
-    </View>
-  ) : null
+
+        <Button
+          type="default"
+          onPress={() => setLangPrefs.setPostLanguage(suggestedLanguage)}
+          accessibilityLabel={_(
+            msg`Change post language to ${suggestedLanguageName}`,
+          )}
+          accessibilityHint="">
+          <Text type="button" style={[pal.link, s.fw600]}>
+            <Trans>Yes</Trans>
+          </Text>
+        </Button>
+      </View>
+    )
+  } else {
+    return null
+  }
 }
 
 const styles = StyleSheet.create({