I can type anything in bengali without any issue -- হঠাৎ, কিংকর্তব্যবিমূঢ়, সংশপ্তক, বর্ষাকাল...

Not sure about other "second class" languages, this open source phonetic (unicode) keyboard is extremely popular in bangladesh, and everyone does all sorts of bengali stuffs with it --

https://www.omicronlab.com/avro-keyboard.html