So, I speak English or I speak American English, American Southern English and I am learning British English. Mostly, I have no problems either understanding or being understood. I get a lot of, “Where are you from?” and variations on that question. I also get an occasional, “. . .with THAT accent!” Some people are just contrary.
As though everyone I meet does not have an accent. Some are barely comprehensible. I love the Scots’ accents unless they speak fast and then it is like hearing a Formula 1 race. All sound and no comprehension. So, I watch Shetland to help with that before I venture to Zetland.
I usually have little difficulty communicating and I do assimilate some British pronunciation and terminology. However, you will not hear me using aluminium. Why in the world is an extra syllable necessary? I do not get it. It is aluminum! Thank you very much.
The occasions that are most difficult are when playing Scrabble with British people. Between spelling differences ( such as er or re AND those words with unnecessary letters) and British words like “po” it is a constant grab for the dictionary.
Be that as it may, I am learning to communicate in Britain with the occasional mishap.