Were Roman Legionaries All Romans?
Not every Roman soldier marching into Gaul or Britain was actually Roman. Some legionaries didn’t even speak Latin.

Unknown — "Intaglio: Imperial Eagle" (c. 1–25 CE), CC0
Only 'Romans' Under the Eagle?
Think of a legionary: bronze helmet, red tunic, Latin curses. We picture them all as born citizens of Rome, marching for the city on the Tiber. That’s what every movie says, at least.
Most Were Foreign Recruits.
By the height of the empire, half the legions were filled with men from the provinces: Spaniards, North Africans, Dacians, Syrians. Many didn't speak Latin natively. Tombstones in Britain list soldiers born in what’s now Syria or Thrace. After 212 CE, all free men in the empire became citizens—but Rome’s legions were already a global force.
Myth Made by Rome Itself.
Roman officials loved the idea of a pure, citizen army defending the heart of their world. But pay records and burial stones tell a different story—Rome’s real power came from welcoming outsiders into its ranks, and granting them citizenship with every battle.
By the second century, up to half the Roman army was made up of non-citizens: Thracians, Gauls, Syrians, and more. The empire ran on the strength of its 'barbarians' in uniform.