Male baristas aren’t called baristos for the same reason that male Sandinistas aren’t Sandinistos. There’s a certain class of nouns in both Italian and Spanish where the definite article changes to indicate gender, but the noun...
If you master a second language by the age of ten, native speakers won’t recognize that it’s not your first. Even so, things like idioms or prepositions can often trip up even the most skilled second-language speakers, if their second...