system
A chat on subreddit /r/NoStupidQuestions
human
I have a new coworker from Nigeria and his accent is so thick I legit couldn't understand a thing he said the first while (English is my second language too which means it takes more effort for me to understand any accent that's not Canadian or the easy to to understand British/american etc. Now 6 months later it's better but I still have to really focus and there are key words here and there I just can't understand.

Edit: now i think about it I never had issues understanding my Russian or French coworkers thick accent lol. But some British accents are so hard to understand
gpt
&gt;English is my second language too

Oh that makes a huge difference! I was studying Spanish a lot awhile ago and met some Spanish speakers (who wanted to learn English, to help each other practice), and everyone said the same thing - the trickiest were heavy southern accents, Irish, Australian, really anything other than American or pretty light British accents (I've heard clips of some English accents that I can't even understand as a native speaker!)