Here are two rather false friends which are quite common among German native speakers.
False friend #1:
Greet Vienna from us!
This is not the proper English phrase, but a false friend based on the German expression
Grüße Wien von uns!
More generally, the German “jemanden grüßen lassen” translates into the English expression “to send/give someone one’s regards”. In contrast, “to greet someone” means “jemanden (be)grüßen”, and refers to the act of recognising someone’s arrival or entrance with phrases such as “Hello!”.
False friend #2:
is not typically used by native speakers. Instead, they would say
Have a nice weekend!
The expression “Nice weekend” is most likely a literal translation of the German expression