With the latest Fire Emblem Heroes update, quite a few mechanics and characters were added to the game. Fire Emblem Heroes also now supports Traditional Chinese starting with Version 2.0.0.
The language of the app can be changed by going through the settings, but a new voice pack will need to be downloaded. Traditional Chinese support for Fire Emblem Heroes adds Chinese subtitles but uses the Japanese voices. The new voice pack will take up 202.6MB of storage on mobile devices.
Fire Emblem Heroes is currently available for iPhone and Android.