Ulysses devises a strategy to can hear sirens singing safely describe what he does to achieve his goal you mean this right
Que ESPANOL Alba dos is no Albaanos
A vernacular language is a spoken language of a given place, which is not used for official purposes.
In the medieval Europe, the official language - the one found in the books and used at the University- was Latin, so this was the language that was not vernacular.