Ship a full shared Japanese catalog for Web, desktop, and Android, resolve ja-JP to ja instead of English, and give iOS a three-language path with Japanese login, settings, and list chrome. Unmatched languages still fall back to English.
Ship a full shared Japanese catalog for Web, desktop, and Android, resolve ja-JP to ja instead of English, and give iOS a three-language path with Japanese login, settings, and list chrome. Unmatched languages still fall back to English.