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"Lagos" is a proper noun which is often translated as "Lagos", and "Rio" is a proper noun which is often translated as "Río de Janeiro". Learn more about the difference between "Lagos" and "Rio" below.
Rio(
ri
-
o
)A proper noun refers to the name of a person, place, or thing.
1. (colloquial) (city)
A word or phrase that is commonly used in conversational speech (e.g., skinny, grandma).
a. Río de Janeiro
When I visited Rio, I stayed in Barra da Tijuca.Cuando visité Río de Janeiro, me quedé en Barra da Tijuca.