"1You/2one can learn a language faster if 1you/2one 1go/2goes to live in a country where it is spoken...". You need to be consonant and keep to one or the other.///

That aside, ''you'' is much more informal and friendly than ''one''. That is why the queen of England always 'ones' and never speaks of herself as ''I''. Be careful, grammar books and English exams might want you/one to address yourself/oneself as ''one'', so you/one should know about it. On the street, you/one might sound very odd if you/one called yourself/oneself or others 'one'. Compare the following: anybody, somebody, nobody ... with ... anyone, someone, no one (none). To me 'one' sounds suspect and abstract, but 'body' sounds very definite.