How to say in Czech: His native language is Slovak.

English
native language is
Czech
Jeho rodný jazyk je slovenština.
Slovak is a difficult language.
His Slovak is getting better.
His Slovak is very good.
How good is his Slovak?
Is he learning Slovak on his own?
He is learning Slovak.
He is not Slovak.
He is Slovak.
Is he learning Slovak?
Is he 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.