How to say in Czech: Is he learning Croatian on his own?

English
Is learning on his own?
Czech
On se učí chorvatsky jako samouk?
He is learning Croatian.
Is he learning Croatian?
Where did he learn Croatian?
His Croatian is getting better.
His Croatian is very good.
His native language is Croatian.
How good is his Croatian?
He is Croatian.
He is not Croatian.
Is he Croatian?

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.