I believe in Mexico they are not allowed to fail your citizenship based on the lack of Spanish language. I thought this was interesting. Probably a very small percentage of Mexicans, born and indigenous to Mexico, are fluent only in their native language. I don't know how they manage to achieve any education - but it is still a reality. This was a problem in the U.S. as well - many of the migrant workers are from Oaxaca, and many were unable to make use of Spanish language services and resources in the U.S.A.