How did Roman expansion affect Celtic-speaking peoples in Gaul and northern Italy?

Roman expansion profoundly transformed Celtic-speaking peoples in Gaul and northern Italy, leading to their eventual assimilation into the Greco-Roman world.1

In northern Italy, the region known as Cisalpine Gaul was settled by Celtic tribes such as the Insubres and Boii. Following a series of conflicts, Rome conquered these territories between 224 and 191 BCE, eventually incorporating the region into Italy. Rome consolidated its presence through the construction of roads, such as the Via Aemilia, and the establishment of colonies that replicated Roman social and urban structures.234

In Gaul, the process of Romanization was characterized by the adoption of Latin as the language of administration and education, which eventually led to the development of Romance languages. While the Romans initially viewed the Celts as barbarians, they later integrated the Gallic aristocracy into the Roman political system, granting them eligibility for the Senate and governing posts. The Romans built cities, roads, and infrastructure, and while some Celtic terms related to rural life persisted, the Gallic population largely assimilated into the Roman imperial framework.1526