I talk to people regularly who use translators part time. This is very standard behaviour and by itself not indicative of AI. I don't know what you mean with "regular phrases". These AI bots are mostly trained on fanfiction to my knowledge and tend to overuse highly specific phrases in each individual case (except maybe the many Y/N base bots. Not sure about those). I don't interact with AI bots myself though. It's something I've noticed through YouTube passively over the years. They must have some dubious source at least, because lore mistakes are common. The Y/N centered bots, I've seen less of, but there seems to be a streak of being so over the top, it reads a bit like a comedy. Or perhaps a soap opera.