Exactly. Misogynist Baptist preacher Gary Chapman.
I did look it up ages ago because (1) it's such obvious horseshit and (2) I used to get irritated about how it used to be parrotted on here as if it was the result of generations of peer-reviewed research, rather than the money-spinner of some evangelical grifter.
Actual research suggests no basis whatsoever to the idea that people have a preferred 'love language' or that relationships are happier when both people 'speak' the same one.
Not that any of that stopped Gary writing about five follow-ups adapting the same non-insight for different contexts. There's a specific one about 'love languages' in military families. I imagine that is particularly hair-raising. I don't imagine that Gary C is envisaging a female major.