There are other measures and rankings elsewhere.<p>In addition to the additional metrics you mentioned, perhaps yet another to take into account is how hostile natives feel towards you when traveling in certain parts of the world--up to and including harassment, kidnapping, and (in limited locations) beheading risks.<p>In places (even here in Europe) where people tend to by default assume good English speakers to be American, I get better treatment by managing to convey that I&#x27;m not.