The Five Love Languages: How to Express Heartfelt Commitment to Your Mate is a 1992 nonfiction book by Baptist pastor Gary Chapman.

[5] Scientific studies on the validity of love languages have yielded mixed or inconclusive results, with much research leaning toward refuting the concept.

[8] A 2006 confirmatory factor analysis study by Nicole Egbert and Denise Polk suggests that the five love languages may have some degree of psychometric validity.

[9][non-primary source needed] A 2017 study published in Personal Relationships involving 67 heterosexual couples found limited evidence that synchronized love languages correlated with relationship satisfaction.

[11] Since 1992, Chapman has written several books related to The Five Love Languages that adapt its principles to different contexts: