Really awkward as well. Basically the whole staff was waving at us until we went around the corner and they couldn’t see us any more. Didn’t know what to do - ignore, acknowledge, turn back and keep eye contact while still walking forward, smile, stop, wave ...
Outside of that it's on an establishment by establishment basis. I know an amazing restaurant in a less touristic Paris arrondissement that will provide stellar service no matter who I show up with or how terrible my French is. Their menus are only in French. If I'm not fast enough the staff notices I'm using a translation app and starts translating it into English.
Japan. Phenomenal service every single place I went and some was so good we tried tipping only to be chased into the street to have the “mistake” fixed.
Sure, tipping may be an incentive as well, but most people I know won't go below 10% even if the service is terrible.