Most of the old family stories about the ancestors in Spain joining the crowd getting on a ship and the hell out of Dodge in the 16th century involve being asked to leave-or else-and that seems to have been pretty common among Basques at that time. Apparently they were even more anti-government then than they are now-not fond of the Spanish crown, but they were good sailors so they chose signing onto a crew and leaving over “or else”-the story is likely true, especially for those who left Spain early...
Since most of us still live in S and W/W central Texas, and sometimes do business-construction materials, freight and livestock trucking/hauling-with people on the other side of the border-we still learn Spanish as a 2nd language in early childhood. But the Mexican/Norteno dialect spoken in N Mexico and the border of Texas and NM does not mean you can comprehend Spanish from Spain very well-one of my cousins who is a teacher pursued finding documentation of the family and their activities prior to about 1400-got document copies, etc-but she says the difference in dialects has been as much of a problem in translation as finding the stuff at all. Probably like a person from Louisiana who speaks Cajun French-or a Canadian who speaks Quebecois-going to someplace in rural France and trying to communicate...
:^)