Fun fact, the “Five Love Languages” were invented by a Baptist pastor, and essentially have no research backing. It was basically “oh, your husband’s love language is physical touch, your love language is acts of service - love for you should be putting out and cleaning up!”
My own experiences in couples therapy align with the other two comments. In my experience it was used against me, as a way of not acknowledging the burden of the domestic labor. My ex husband refused to do laundry, dishes, essentially do anything related to maintaining the home. But instead of “hey, adults have to clean up after themselves” the therapy speak turned it into “your love language is cleaning, and his isn’t, so he doesn’t have to do anything.” His love language was “gifts” and “words of affirmation” also, so I also wasn’t “matching” his love language, because I wasn’t constantly praising and giving him things.