"Hell," "Damn," and "ass" are used infrequently. Anything stronger is censored, but you could still tell what words their saying through context.
"Suck," "god," "crap," "piss," "hell," "damn," "ass," "bastard," "dick," and "SOB" and "BS" acronyms in the pitch meetings for "Bird Box" and "Men In Black" respectively. All language stronger than the expletives listed above are censored out of fear of demonetization, although "dick" and possibly "bastard" are actually stronger expletives than the other b-word, which is one of said bleeped words.