I don't know about Brazil, but I know that about one third in Russia is proficient in English and I would confidently say that in Russia there is more English proficiency than in both countries you mentioned, Brazil and Mexico. This is a source citing a test, but I also read across a couple of other sources. Since I know some Russians very well, I can tell from what they told me and English is quite well known. The reason is that Spanish or Portuguese is so widespread that these people are less dependent on learning additional languages. But no worries, this is not to educate or insult anyone here. It was a little interesting discourse either way. But language, as you said, shouldn't really matter. It is more about distances and political repression like in Qatar. Those are the things that we as consumers or visitors should be concerned about.
https://en.wikipedia.org/wiki/List_of_countries_by_English-speaking_population
Language is really no point here and I am sure that it is something which could easily be taken care of by setting up info points for tourists and so on and so forth. As I mentioned above it wasn't meant to attack you or anything, but from your merit I understand you didn't take it as such.
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