Like I said above, that just amazes me, that when you say there isn't an expression in Tamil that's really used, that you mean people literally say the English. But it makes sense, too, that it's not quite the same as saying it in English since it's not always used in the context English-speakers would use it. There's probably a lot of expressions in English like that too (that are from another language but have been made part of English) but after a while people don't even really notice them.

Yes, this discussion is so cool! And makes me more determined to be better at languages. I'm so jealous of people who have a knack for them.