https://en.wikipedia.org/wiki/JCUKEN

Remember the tanks that had the marking painted on them as Z ( zed in English or zee in American English).

There is no Q or ( cue) sound in Russian Cyrillic , no way to use it.

The Russian keyboard is not QWERTY it is JCUKEN.

Take a look at the letter placement and see which letter takes up the place of a Q.

Yes it’s a unique Russian letter that is written as a backwards Z.

Just another coincidence to add to the list.

They marked their tanks with a Q👍