I often hear German native speakers (I am one myself) ask those questions, and it seems to me that they are pretty much translated word by word into English.
- Is this chair free?
- There is a free room in the house.
What is the proper way of asking, say, whether a chair on a table is taken or not?
For me it seems like the second statement means that the room is free, as in one doesn’t have to pay for it (gratis). Or does it also mean that there is one extra room in the house?