How to say in Czech: Are they learning Slovak on their own?

English
Are learning on their own?
Czech
Oni se učí slovensky jako samouk?
Are they learning Slovak?
They are learning Slovak.
Where did they learn Slovak?
How good is their Slovak?
Their native language is Slovak.
Their Slovak is getting better.
Their Slovak is very good.
Are they Slovak?
They are not Slovak.
They are Slovak.

Czech phrasebook and translator with tens of thousands of sentences translated by humans. Czechslator is being developed by Michal Měchura. CREDITS Czechslator's sentence generation engine is partially based on Grammatical Framework. All Czech pronunciation is computer-generated using Microsoft Azure Text to Speech. When Czechslator cannot find a translation in its own database, it looks in the PanLex dictionary or obtains a machine translation from Microsoft Translator. PRIVACY Czechslator does not save any cookies in your web browser and does not collect personally identifiable data. Czechslator uses StatCounter for traffic analysis, configured not to save any cookies in your web browser and not to collect any personally identifiable data.