This is episode 19 of 70 of Trust Me, I Know Sign Language. Play it below, then continue straight into the next episode — the whole season is free and needs no account.
Opening of the season — the setup and the first turn.
A broke woman applies for a sign language job, accidentally becoming a ruthless mafia heir's fiancée. She faked her skills and fears bankruptcy if exposed. Mistranslating wildly to survive, she discovers he's faking muteness too—and eventually wins his heart.