I often hear these mistakes made by German speakers who are learning English.
They say: Oh no! I forgot my phone in the hotel room. I’ll go and get it. I’ll be back in a minute.
This is totally understandable but not correct. It’s the wrong verb.
Correction: Oh no! I have left my phone in the hotel room. I’ll go and get it. I’ll be back in a minute.
The verbs leave and forget are both used to say that we did not remember to bring something with us but we use these verbs in different contexts.
E.g. My boss is running a little late for the meeting today.
When he got to the office he realised that he had forgotten his laptop.
He had left it in his office at home and he had to go back and get it.
Hopefully he hasn’t left anything else behind.
Have fun learning English!
Louise