Rich Push Notifications Integration
Rich push notifications allow you to include images, GIFs, video and audio files in your notification content, as well as interactive elements such as buttons.
In case the user changes the language of the push notification button(s), the change will be visible the next day, due to the app configuration call that is being performed only once a day (as these calls represent a lot of unnecessary data flow).
The following documentation explains to you how to integrate those actions with an appropriate mobile OS: