Possible Clues:

• Quito's country: Abbr.
• Quito's land: Abbr
• Col. neighbor
• OAS member
• Galápagos locale: Abbr
• S. Amer. land
• Cotopaxi's country: Abbr.
• S.A. country
• O.A.S. member: Abbr.
• Quechua is among its official langs.