Clearly you need to watch The Passion of the Christ, You Mel Gibson-let!

I invented a Nahuatl (Mexican) speaking planet. Very heavy Quechua (Peruvian) influence and heavy Pericu/Guaycura however on their dialect. The capital of their polity the Itičuyu is between the four lakes and the mountains.

A Planet orbiting two M-Type Stars and orbited by moons. Seeded by Aliens with Guaycuras and Pericues from Las Palmas Complex. Then gradually seeded with Mayans, Aztecs and Incas. Eventually the Guaycuras and Pericues began to speak a dialect of Classic Nahuatl of their conquerors albeit with strong Quechua influence of their later conquerors and Mayan, Guaycuran and Pericue substrata influence.