I have a friend who has a black dad from italy, a white mom from russia and lives in sweden. He speaks all three plus english fluently which is very interesting sometimes.
One of the first Irish guys I met in Ireland was the son of French teacher. He had been born while she was working in Africa (I forget which country) and so spoke absolutely fluent French, but with the thickest of African accents. Chatting with him was a delight, but also a constant struggle between my respect for him and complete hilarity.
I had a professor who looked Chinese but spoke with an Indian accent. Similar story. Made sense he got into linguistics
He might be from Northeast part of India.
He was raised by an Indian family in Malaysia. Really fun teacher, he could switch between different accents very easily and naturally, but an Indian accent was his default way of speaking
Reminds me of this really interesting video on the Mississippi Delta Chinese community -- folks who are entirely of Chinese descent but who have thick Southern drawls and names like Gilroy, and still feel like outsiders despite living there their whole lives.