I am also bilingual. My pet theory is that it has to do with growing up, family authority over you as a child, etc. As a kid if you say a strong curse word you

I am also bilingual. My pet theory is that it has to do with growing up, family authority over you as a child, etc. As a kid if you say a strong curse word you could likely get in trouble and it would be a memorable negative experience. But if you say it in a different language outside your family home there is rarely a negative consequence. My family was particularly absurd: my mother wouldn’t curse and wouldn’t say the word for shit in Russian but would use the English word “shit” as a curse word. Go figure.