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

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

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.