Sounding different is a big deal, and for some reason I remember a scene in an hbo series where one of the characters had an audio-how-to-tape of doing a cajun accent for actors..
I am often blown away when I learn an actor is doing an X accent for a series when they are from continent Y and when you hear them speak at an event they have a totally different accent. eg https://www.google.com/search?client=firefox-b-1-d&q=rick+gr...
I don't know exactly what you mean when you are saying when you say look and sound different..
I can say that my level of exhaustion with trying to parse what people are saying and what they are meaning when hearing accents from various parts of the world is a thing.
Pre-internet life had me only engaging with tough to understand accents on occasion, and so I did not mind spending time trying to hear then understand what is meant by someone when I ran into issues (and to ask for interpreter when I could not get it (remembering you, bayou of Louisiana gas station attendants)
Yet today I have so many phone calls and tutorial videos and such coming at me with accents that are so hard to understand - it slows my thinking and requires an immense amount of energy to get through a couple of paragraphs - I do generally give up and try to find another source of info that is easier to understand.
This is something that weighs heavily on decision making, who to work with, who to learn from, and more actually.
I think it is something that can be learned and practiced and gotten better at, thought I have no idea of the best resources.. if you feel you want to have smoother relationships with folks from another part of the world, but I have no idea how hard / easy it may be.
2 cents of random thoughts without specifics.