concur in the ideal world - and it would be so if we could choose our parents.
sadly we are not so lucky (I was thankfully)
and ya "the language of love" (refer to Robert Sheckley's short story on this topic (I did a "radio-reading/drama" on his short 20 yrs ago - and you can refer to Robert Hanson's version of the same short via "mindweb's - via internet archive webstie), is the a good lighthearted story, though not apt.
note Sheckley's short is not philosphical - and utterly off topic - i just read your comment and my mind went to it - and my reading (i uploaded to Usenet eons ago - 20 yrs ago, and of the Mindwebs show using the same short by Sheckley.................so commented.
but ya and no, if one was born via monster parents, not knowing of love, such a language would be foreign, and why we have serial killers. so not an easy language to learn (and IMO - post puberty is a "wall off" biologically - and so too late to learn that language)