http://www.ncbi.nlm.nih.gov/pubmed/6670052 http://www.ncbi.nlm.nih.gov/pubmed/6670052 I read about this anecdotally regarding specifically foreign language tea

http://www.ncbi.nlm.nih.gov/pubmed/6670052 http://www.ncbi.nlm.nih.gov/pubmed/6670052 I read about this anecdotally regarding specifically foreign language teachers who go abroad and practice a foreign tongue almost exclusively when unwinding with the help of the cheap local ferment, on their return they find the fluid conversation ability really only surfaces when intoxicated, and speaking fluent Spanish while drunk at a party is impressive to no one.