Let’s be honest: there is that retains the original English bad words. The Censor Board of India (CBFC) does not allow explicit Tamil swear words in a U/A or A-rated film on television. If you find a version online claiming to have "Original Bad Words in Tamil," it is almost certainly a fan-made AI dub or a voiceover by amateur YouTubers.
Unlike sanitized TV dubs where "What the f***?" becomes "What the heck?", this fan-made or low-budget studio dub goes in the opposite direction. Common English expletives are translated into raw, colloquial Tamil gaalis (curses) like: Hangover 3 Bad Words Tamil Dubbed