The inclusion of pine boughs and eggs, the Mayan faithful's references to "God the Father and Mother" and the use of indigenous elements in Masses long caused church officials to bristle.
Not so with history's first Latin American pope, who the Vatican said will present a decree during his Feb. 15 visit authorizing the use of indigenous languages. The Chiapas Mass itself would include readings and songs in three different indigenous languages.
Francis' visit comes amid strong challenges to the church in the southern state, including huge inroads by evangelical Protestants and grinding poverty in a region rich with coffee, Mayan ruins, pine-covered hills and jungles. Chiapas has the high poverty rate in Mexico at 76.2 percent.
The challenges have always included the church's relations with indigenous communities who have struggled for centuries to maintain their traditions and independence, sometimes embracing and sometimes clashing with the hierarchy. Religious practices in some communities encourage rampant alcohol abuse, crushing debts and autocratic local bosses known as "caciques."
In some communities, residents have expelled or ostracized any inhabitant who converts to Protestantism, often taking their lands or possessions, or denying them access to basic services like water or electricity.