In several unemployment insurance hearings in which I represented the claimant, the question arose as to whether a specific word, which could have several meanings, could be used in the workplace.
But in Florida, the F word was allowed in a debt collection case. From December 2015:
http://www.law.com/sites/articles/2015/12/17/roofer-tells-lawyer-to-pay-your-f-ing-bill-and-dont-be-a-f-ing-schlub-and-thats-totally-fine/