A studyinvolvingFinnishpeoplespeakingEnglishfoundthatlearning a foreignlanguagecanstrainyourvocalcordsisbecauseyourpitchriseswhenyouspeak a secondlanguage.
It's notallbad, though, expertssaylearning a foreignlanguageatanyage, improvesattentionandconcentrationandevenmakesyourbraingrow.