How to change the language of an app on Mac and iPhone
By Gabriel —
Set the app language on macOS
Since macOS Big Sur you can control which language each app launches in. Simply go to System Settings > General > Language & Region.
There press the plus button to customize the language for the selected app.
Set the app language on iPhone & iPad
In iOS 14 and later you can customize which language each app opens in. Simply go to Settings > Apps, select the app and choose its Language.
Preferred languages
An app, of course, needs to be localized in the specific language you want to select. If your language of choice is not available, contact the app developers to localize their app in your language.
You can also set a list of preferred languages in System Settings > General > Language & Region on the Mac and in Settings > General > Language & Region on iPhone and iPad.
The order of the list of preferred languages determines which languages apps open in when your top priority language is not available in the app. So you should add all languages you can speak in the order how well you understand them.
