He learned to speak 'Czech'.
the customs of the 'Czechs'
the 'Czech' people/language
(..) What are you? I mean, the nationality. Romanian. What about you? Why do you keep stalking me? Go home. Run! Yes, sir. I'm czech... Bologa... what a name. A tin soldier. You know? My husband has a chess table with tin soldiers. And you're a tin soldier! Yes, a soldier that could die in an hour. (..)1965 Forest of the Hanged
(..) So you were moved to this division. Yes. In the th Field Artillery. Ah, right in our regiment! Then, welcome! So, who are you hanging? Hm, a czech sub-lieutenant. Svoboda is his name. He was caught right when he was trying to switch sides. Outrageous, isn't it? Yes, of course. (..)1965 Forest of the Hanged