Language terms are stored in a specific file (Assets/Localization), and by adding a new file inside this directory and translating each term, you can add your language (for more information, see this)
Add Russian language
Add Persian language
Fix the app's functionality for non-English names/paths so you won't face any problems if you store the app in a non-English directory or use a non-English name in the config.
Changelog:
Assets/Localization), and by adding a new file inside this directory and translating each term, you can add your language (for more information, see this)