Most natives of Europe learn the local tongue first, then English. They still learn English earlier than say American kids learn Spanish, but they still tend to think in their native language. I went to a community college with lots of people who were from foreign countries where the native language is very different from English, places like Russia or Vietnam. There's always a time lag as the immigrant mentally translates the English said into their native tongue, mentally replies in their native tongue, then translates that back into English. I figure that it must be extremely frustrating for NT's, if one is an aspie it must be maddening to the point of insanity.
Europe tends to have a lot of aspies, in fact autism seems to happen mostly to people of European heritage, and I know that in continental Europe great emphasis is placed on regular use of English to the point that corporations rarely use anything else. The local tongue is mainly used in informal situations, and in non-work social gatherings. Americans who expect to learn Spanish or French by living in Spain or France are usually greatly disappointed because they'll approach a group, the group will see that he/she is American, and automatically switch to English.
Latin America and China are different, employers and friends will insist on the use of the local tongue. Places like Argentina and Uruguay are better for learning Spanish than Spain, and are usually friendly to gringos. Mexico is another matter-if you're a white person in Mexico you've got a big target on your back reading KILL ME, and even the cops are known to beat and kill Americans. If the drug cartels that rule much of the country get word that there's a gringo wandering around, the gringo gets kidnapped for ransom. Even the cops are known to jail Americans for ransom. Bolivia is much the same way-American missionaries are regularly killed there.
Cuba is actually nicer to Americans than Mexico, especially if they sense that you're working class and are the type to experience cultures for the heck of it, they tend to assume that you're yet another unfortunate oppressed American and sympathize. Young Americans get an especially enthusiastic reception, especially if the young person mentions an affinity for Che Guevara, who is still extremely popular in Cuba and America. Guevara is like the James Dean of communism, he's frozen in time as young and hip and forever loyal.