Multilingual keyboards always use the system language by default, even if other languages have been added. The order of the added languages can be rearranged, which also allows you to define a new default language for the keyboard.
- Tap on Settings
- Tap on General management
- Tap on Samsung Keyboard settings
- Tap on Languages and types
- Open the Menu
- Tap on Reorder
- Drag a Keyboard language to first position to set the default