Inaninamate masculine genitive in a in West Slavic languages

I've noticed that among Polish, Slovak, and Czech, Polish has the most instances of an inanimate masculine genitive in a, followed by Slovak and then by Czech. Nevertheless, I've discovered a Czech word with an inanimate masculine genitive in a, but with a u in Polish and Slovak. It is Czech ocet (vinegar), genitive singular octa. Slovak ocot and Polish ocet have octu in the genitive singular.

Etymology of liliac in Romanian

This Romanian dictionary states that liliac (bat, the animal) comes from Bulgarian liljak. Bulgarian doesn't have this word, though, it is Macedonian that does. Bat in Bulgarian is prilep (прилеп).

Taxi

I've finally found a language that has a native word for taxi: Hebrew monit, מונית.

Kovboj

The English word cowboy probably got this Czech spelling when not many people knew how to pronounce English as kovboj doesn't resemble the pronunciation of cowboy at all, but how a Czech not knowing English might read it. If it entered the language today, it would probably be spelled kauboj.