Complex sentence: Constructions that can be classified as relational nouns are found in many languages, but the concept is usually used within the context of Mesoamerican languages, where the use of relational nouns constitute an areal feature of the Mesoamerican Linguistic Area.
Split into simpler sentences: Constructions that can be classified as relational nouns are found in many languages. The concept is most well known from Mesoamerican languages, where the use of relational nouns constitute an areal feature of the Mesoamerican Linguistic Area.