I see that no one has posted the rest of the chorus to Tumbalalaika here. When I sing it, it goes:

Tumbala, tumbala, tumbalalaika
Tumbala, tumbala, tumbalalaika
Tumbalalaika, spiel balaika
Tumbalalaika, freylach zol zein

"Spiel" means "play". "Freylach zol zein" means "we should be happy". As with any other Yiddish words, the pronunciation varies depending on where you were born.