Yes. |
You can start with the 40 or so studies cited here http://www.sde.ct.gov/sde/lib/sde/PDF/Curriculum/Curriculum_Root_Web_Folder/BenefitsofSecondLanguage.pdf More are cited in this book https://www.google.com/url?sa=t&source=web&rct=j&url=https://books.google.com/books/about/Effects_of_the_Second_Language_on_the_Fi.html%3Fid%3DTZMEemWIlyEC&ved=2ahUKEwjbh9Cnx_PYAhVO9WMKHdlzBgcQFjAUegQIBhAB&usg=AOvVaw1sdc9Og3-kovPKdYQHTCk3 |