(We have it lucky. Polish and Ukrainian are mutually intelligible to some extent, which enables basic communication even without knowing each other's languages.)
I said, to no one in particular, "Do widzenia, слава Україні" as I was leaving. She reciprocated the customary "Героям слава" in an obviously moved voice.
Small things matter. We need to support each other in every possible way. Donating helps, so does showing solidarity, and so does spreading the word.
Будь в безпеці, zverok. Our thoughts are with you all.