Funny question — I dug around a bit for this one. From what I can tell up through mid-2024 there isn't a widely released feature film called 'Watch Your Mouth' that hit cinemas or major streaming services in a big way. That doesn't mean the title doesn't exist at all: smaller indie shorts, festival pieces, or foreign films sometimes carry that exact phrasing or a translated equivalent, and those can be easy to miss unless you follow niche festival lineups or local indie circuits.
If you're trying to track one down, my go-to trick is to check IMDb and Letterboxd first, then cross-reference with JustWatch to see if any platform picked it up. Film festival sites (Sundance, TIFF, SXSW) and Vimeo/YouTube can reveal shorts or micro-budget projects. If you have a cast member, director name, or even a social post, that makes the search way simpler. I like setting Google alerts for quirky titles — it's saved me from missing small gems before.