I'll bet they'll me mandated by the FCC! That is, if anyone even cares about profanity by then.
Historically the FCC is loathe to mandate anything, particularly a copyrighted technology. For example, HD radio was never mandated. It was merely approved. But the approval didn't require any use. If the FCC is going to approve a technology, there will be a testing period, and a period for comments. In addition, even if they were to approve it, they would be clear that the use of such technology would not absolve the licensee of any responsibility should the device miss a word and a complaint is filed. Very complicated procedure.