Yes, Portuguese is a Latin language. It evolved from the Vulgar Latin spoken by the population of the region that is now Portugal during the Roman Empire.
Over time, as the Roman Empire declined and local cultures emerged, the language began to transform. The influences of various invasions and interactions with other cultures, such as the Moors and the Celts, also played a significant role in shaping the Portuguese language.
Today, Portuguese is part of the Romance language family, which includes other languages like Spanish, French, Italian, and Romanian. These languages share a common origin in Latin, and although they have diverged significantly over the centuries, they retain many similarities in vocabulary, grammar, and syntax.
In summary, Portuguese is indeed a Latin language at its core, and its evolution reflects the rich history and cultural influences of the Iberian Peninsula.