Echoing back the verb is a common way to reply affirmatively in Portuguese and (traditional) Galician. I hear that was common in Latin too. For some old Galic

Echoing back the verb is a common way to reply affirmatively in Portuguese and (traditional) Galician. I hear that was common in Latin too. For some old Galician people, replying "yes" to a question is comprehensible but a mark of rudeness.