Quechuan and Aymaran spelling shift
In recent years, Peru has revised the official spelling for place-names originating from Aymara and the Quechuan languages. A standardized alphabet for done Quechua was adopted by the Peruvian government in 1975; a revision in 1985 moved to a three-vowel orthography.
Source: Wikipedia — Quechuan and Aymaran spelling shift (CC BY-SA 4.0)