We had a client that was from England and it took me a couple of meetings with him where i needed to listen closely to what he was saying. After that i had no issues and after a bit i no longer heard the accent.
Same with when i used to follow baseball. i watched the red sox and their announcer, jerry remy has a big boston accent. it took a few games for me to get used to it and eventually I didn't hear the accent anymore
Not related to the post topic at all, just saying