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https://journals.sagepub.com/doi/10.1177/09637214231217663
"The public has something of an obsession with love languages, believing that the key to lasting love is for partners to express love in each other’s preferred language. Despite the popularity of Chapman’s book The 5 Love Languages, there is a paucity of empirical work on love languages, and collectively, it does not provide strong empirical support for the book’s three central assumptions that (a) each person has a preferred love language, (b) there are five love languages, and (c) couples are more satisfied when partners speak one another’s preferred language."