Wonder what chemical analysis they did, as it could also be stoned parents are more likely to talk to a child in a more inclusive way and avoid “baby talk”

https://www.psychologytoday.com/us/blog/parenting-translator/202308/new-research-on-enhancing-your-babys-language-development

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5510534/

https://oneill.law.georgetown.edu/talk-to-me-baby-the-benefits-of-frequent-high-quality-conversations-with-babies-on-brain-and-language-development/