I think it only matters what groups you have to face in your neighborhood. People from different backgrounds will stick together if they have shared values or heritage.

One thing I imagine that could be a bit scary about immigrants from less “civilized” countries is that they are more used to the rough life that we will experience after the collapse. Many of them who come from lawless areas are probably pretty street smart.

In the US it also makes a lot of sense to learn Spanish. When I called my bank over there a few years ago they already had the option to connect me to Spanish speaking staff but I heard this is already common.

One of the real dangers of immigration to a country and culture is if people do not integrate. I understand it makes sense from a business point of view to allow people to do business with you in Spanish but you create a parallel society and this can lead to tensions between the two groups of course.

Alea iacta est ("The die has been cast")