Klaten Regency is a regency in Central Java province in Indonesia. It covers an area of 701.52 km2 and had a population of 1,130,047 at the 2010 Census and 1,260,506 at the 2020 Census; the official estimate as at mid 2023 was 1,284,386. Its administrative centre is in the town of the same name; the town extends over 35.85 km2 to encompass three of the regency's districts, with a combined total of 135,681 inhabitants in mid 2023; a fourth district (Kalikotes) is part of its urban area.

Javanese is a Malayo-Polynesian language spoken by the Javanese people from the central and eastern parts of the island of Java, Indonesia. There are also pockets of Javanese speakers on the northern coast of western Java. It is the native language of more than 68 million people.