The Romans arrived to Galicia (I BC) very much later than they did to the rest of the Iberian Peninsula (III BC). Thus romanization begun late. This process leads to the assimilation of the Celts -and other peoples- to the language of conquerors. Latin becomes the language of Galician people, although this was a slow process, achieved by marriages and several administratives advantages such as gaining roman citizenship, lands distribution, etc.

This process of romanization also successed in other places. This explains why Romance languages evolved from the language spoken at that time, vulgar latin.

Roman walls of Lugo.