Yeah, it's weird to put it this way. The thing though is: the whole dev team at our company speaks Polish, so it would be very uncomfortable to be the only person who doesn't.
The requirement is to speak Polish. You're right, that's what we should've put there. (In practice, though, it's extremely rare that someone speaking Polish wouldn't be a native.)
- speak Polish
- have Polish citizenship
- be a native of Poland
The first two of those aren't very strange. The last one is.