android spell checker (AOSP) doesn't have my language ! How do i fix that ?

[Android Central Question]

android spell checker (AOSP) doesn't have my language ! How do i fix that ?

 

[B. Diddy]

Welcome to Android Central! Which device do you have?

On my Pixel 2 XL, if I go to Settings>Languages & Input>Spell Checker​, there's an option for Languages. Tapping that gives a long list of possible languages. Do you have that?