20 points 20 points and a

what is the culture for, northern mexico ,central mexico ,greater mexico ,southern mexico

An overwhelming majority of Mexicans today speak spanish. It's spoken by exactly 92.7% of Mexico. 6% of the popularity speak regional languages, and indigenous languages such as Mayan, and Nahuatl.

Northern Mexico Culture: They have a dominance of meat in the region. Some of the most popular dishes are "machaca", "arrachera" and "cabrito". The region produces cheese. These include "queso fresco", "ranchero", "cuajada", "requeson", and "creamy semi-soft queso menonita". That's the food. The northern mexican music, greatly influenced polkas which is now one of the most famous traditional dances in Mexico. The religion most prevalent in northern Mexico is the Roman Catholic Church.

Northern Mexican Languages:

Nahuatl
Yucatec
Zapotec 

Central Mexico Culture: The food in Central Mexico are as varied as it's own landscape. Central Mexico has award winning restaurants of colonial Aguascalientes.

Central Mexican Languages: 

Nahuatl
Durango
Uzbek

Southern Mexico Culture: Southern Mexico has a tropical or subtropical climate and some rain forest. It is characterized by a strong indigenous heritage and is also the poorest. The food of Southern Mexico are "Tlayuda", "Chapulines", "Artisan Sweets", "Quesedilla", "Tortas", "Mole Negro", "Huevos Motulenos", "Sopa Azteca And Alambres", and "A Rainbow On Every Plate".

Southern Mexican Languages: 

Spanish
Nahuatl
Yucatec Maya

I'm sorry, but I'm not sure about Greater Mexico.