Romans speak Latin, which happens to be almost the same as Italian.
About the addiction, consider that all Roman civilizations (Rome & Byzantium) have units with overpowered base strength. That is a big plus to play them. You said you like Roman History, & that may be one of your major reasons to be addicted. The UB's special ability (+25% GP points) is really useful (& kinda cheaty IMO); & if your gameplay is based on expansion by conquest, the leaders' traits (all Roman leaders are imperialistic, btw) will combine favorably with the civ's unique stuff.
In my case, I'm developing a strong preference for the Celts (playing as Brennus), but I wouldn't consider it yet as an addiction. I do like the civ's history, but I rather like better their starting techs, as well as Brennus' traits (Car/Spi). For my part, I rather prefer cultural, score & space race victories, & having a good amount of happiness in your cities from the beginning is a titanic plus.
For my part, I hate to play as the Romans, mainly because they're overglorified in the Western World.