Because the Romans occupied many Countries in the world.
The Roman Catholic Church used Quechua to preach Christianity.
Because the soldiers manning the out posts of the Roman Empire spoke/wrote in Latin as it was the official language of the Roman Empire... ergo if you wanted any association with the Roman Empire you had to know basic latin. Latin really caught on as being the one, uniform language of the whole Roman Empire
The Romans spoke Latin. Latin spread through the empire because it was the language of the rulers. The spread of Latin was also helped by the establishment of colonies (settlements) of Romans and Latins around the empire.
Roman culture and language was inferior to that of the Greeks.
It became the lingua franca of the Western Empire, and the basis of much of French, Italian and Spanish language development.
The Latin language originated in central Italy, in the region around the city of Rome. Many peoples in the vicinity spoke languages similar to Latin and were incorporated early into the Roman Republic. Latin was the governmental language of the Roman Republic and then of the Roman Empire, and so was spread throughout much of Europe.
The Romans passed their own language of Latin to the people they conquered in Europe. Over time, the Roman Lain evolved into several European languages.
The Romance languages are a group of modern languages that evolved from Latin, the language of the Roman Empire. They are called "Romance" because they developed in the regions where the Roman Empire had once spread its influence. This connection to the Roman Empire is reflected in the name.
As the Roman's began to conquer More and More places Roman culture and politics spread.
Tolerance of religion and migration helped the process of cultural diffusion in the Roman Empire. Although the criteria for being considered Roman were forced on many of these people, their unique cultures were not rejected.
The language of the Roman was Latin. Quomodo es?
Christianity did not easily spread through the Roman Empire. See the related question, "How did Christianity spread throughout the Roman Empire?"