eu usero - i use (it)
Discussion
it's not "uso euros" because in portuguese you turn the last word in a sentence that has an "s" at the end to "sh"
that would be like "eu usar euros" "eyu yusar erosh"
also, if i put "eu usero" into google translate it says it's brazillian portuguese and it means "i will use"
in european i think it would be "eu vo usar"