The Uspanteko is a Mayan language  of Guatemala

Guatemala

Guatemala is a country in Central America bordered by Mexico to the north and west, the Pacific Ocean to the southwest, Belize to the northeast, the Caribbean to the east, and Honduras and El Salvador to the southeast...

, closely related to K'iche'

K'iche' language

The K’iche’ language is a part of the Mayan language family. It is spoken by many K'iche' people in the central highlands of Guatemala. With close to a million speakers , it is the second-most widely spoken language in the country after Spanish...

. It is spoken in the Uspantán

Uspantán

Uspantán is a municipality in the Guatemalan department of El Quiché. It is one of the largest municipalities of El Quiché and stretches from the mountainous highlands in the South to the tropical lowlands in the North. The municipal seat is in Villa de San Miguel Uspantán with a population of 2,800...

 and Playa Grande Ixcánhttp://www.inforpressca.com/playagrandeixcan/ municipios, in the Department El Quiché

Quiché (department)

El Quiché is a department of Guatemala.El Quiché department is in the heartland of the Quiché people, to the north-west of Guatemala City. The capital is Santa Cruz del Quiché.-Population:...

. It is also one of only three Mayan languages to have developed contrastive tone

Tone (linguistics)

Tone is the use of pitch in language to distinguish lexical or grammatical meaning—that is, to distinguish or inflect words. All verbal languages use pitch to express emotional and other paralinguistic information, and to convey emphasis, contrast, and other such features in what is called...

 (the others being Yukatek

Yukatek Maya language

Yucatec Maya , called Màaya t'àan by its speakers, is a Mayan language spoken in the Yucatán Peninsula and northern Belize...

 and one dialect of Tzotzil

Tzotzil language

Tzotzil is a Maya language spoken by the indigenous Tzotzil Maya people in the Mexican state of Chiapas. According to an INEGI 2005 census, there are 329,937 speakers of Tzotzil in Mexico, making it the 6th most spoken indigenous language in the country...

). It distinguishes between vowels with high tone and vowels with low tone.