NGL, not asking for a friend. Given the current trends in US politics, it seems prudent to at least look into it.
Most of the online content on the topic seems to be by immigration attorneys hustling ultra rich people. I’m not ultra rich. I have a job in tech, could work remotely, also have enough assets to not desperately need money if the cost of living were low enough.
I am a native English speaker, fluent enough in Spanish to survive in a Spanish speaking country. I am old, male, cis, hetero, basically asexual at this point. I am outgoing, comfortable among strangers.
What’s good and bad about where you live? Would it be OK for a outsider, newcomer?
That seems to be a hard thing for many Americans and Brits to do. I have a couple American friends living in Europe who’ve learned the language and immersed themselves in the culture, but they’re exceptional. One even learned both the national and regional language. Not too many Americans who can converse in Catalan.
It may be hard, but if you want to live in a foreign country, it is the minimum requirement I would expect. Forcing your host to permanently bend over backwards just to cater for your lack of effort is most impolite.