I know for a fact that as a child, it was Russian. Now it’s kind of odd. Most of the time, I do have an American accent but have a mix of English too.
Example: I tend to pronounce my “r”’s like an Englishman. When I say “I don’t care/I don’t mind”, something like that, it’s English. I also pronounce words like “bath” or “grass” like an American would.
I love hearing that there is a singular American accent when every place I visit in the US has a different accent, some of which are a struggle to understand.
Any country has a massive number of accents, especially the larger and more populated they are.