Find the best Carioca lessons, classes, and instructors on HeyKiki and learn Carioca. What exactly is Carioca? In Brazil, Portuguese is the dominant language, especially in Rio De Janeiro. But, like any language that is imported from overseas, a native accent develops over time that fits the culture of the area. Viola... you have Carioca. The Brazilian Portuguese accent is a necessity for those visiting the country and looking to assimilate with the said population. Without it, one might stand out as a foreigner... and no one wants that happen to them while abroad.