Whether on audio or by reading his lips, you've heard Tiger say expletives during his rounds. During this U.S. Open, as he struggles, I've heard or seen him drop a couple of F-bombs today.
He's fortunate to be married to Elin, who speaks Swedish. He apparently understands and speaks a few words of Swedish as well.
Maybe he should learn a couple of Swedish swear words, so he won't be caught on TV with his profanity.