And we think we've got language problems! Spanish? Lots of people living in Spain don't want to use it! They want their own regional language. Although my knowledge of Spanish is limited, I could certainly hear the differences between what is spoken in Spain and here in north America. Everyone sounded like they were lisping. You could see their tongues moving with c, s or z, and many cities had signage in two languages. We flew into the airport at Murcia, the capital of the region of Murcia, which is sort of pronounced, MORTH ee ah there instead of mer SEE ah as we had learned it. When checking our bag in Madrid, the clerk wasn’t sure where we were going! It’s between Valencia and Andalucía.
Wikipedia says, "Due to massive emigration from Andalusia to the Spanish colonies in the Americas and elsewhere, most American Spanish dialects share some fundamental characteristics with Western Andalusian Spanish, such as the use of ustedes instead of vosotros for the second person plural, and seseo. Many varieties of Spanish, such as Canarian Spanish, Caribbean Spanish and other Latin American Spanish dialects, including their standard dialects, are considered by most to be based on Andalusian Spanish."
In Catalonia, north of Valencia, home of Barcelona, there are four languages with official status in Catalonia. But Castilian Spanish and Catalan are the major ones. That region was having a referendum on secession and language was just one issue. (Catalan was not used during the Franco dictatorship.) Mainly they were unhappy with 13% of the wealth in the country, they paid 20% of the taxes. That probably sounds very reasonable to the 10% of Americans who pay 68% of our federal income taxes.