I’m Indian. Funny thing is pronouncing it “Tai” with an Indian accent sounds awful. Imma stick with the wrong pronunciation because everyone else says “thigh” here anyway. Ofc the way people pronounce “thigh” in India is also different from the way people from the US would, so it’s not as simple as that.
Sword in Hindi is pronounced with a soft “th” sound. I don’t know where you got your info from.