Second spellchecker doesn't work I have a Nexus 4, and I'm using Google keyboard on Android 4.3.1. When I switch the keyboard language from French (the system language) to Polish, spellchecking stops. I have the polish spell-checking dictionary installed.

Suggestion works in both languages. Spell-checking works only in french.

What should I do?

I'd rather fix this problem than use another keyboard.
This may depend on the keyboard used (Android vs Google). I have fixed this by selecting Gboard and adding there the languages I need.