Translation:This lunch was cooked yesterday.
A good sentence to know if you’re talking to Polish volunteers in a kibbutz.
In Polish kibbutz is: kibuc.
wczoraj sounds like it's stressed on the last syllable
As you know, the intonation or the stress isn't the strongest side of TTS.
"This dinner was cooked yesterday" is not accepted
That's strange, because it is accepted and it should have worked.