Original: Quechuas is the the collective term for several ethnic groups in South America who speak a Quechua language (Southern Quechua mainly), belonging to several ethnic groups in South America, above all in Peru, Ecuador, Bolivia, Chile and Argentina.
Simplified: Quechuas is the term used for several ethnic groups in¨South America that use a Quechua language (Southern Quechua mainly). They belong to several ethnic groups in South America, above all in Peru, Bolivia and Argentina.