Mon language

The Mon language, formerly known as Peguan and Talaing, is an Austroasiatic language spoken by the Mon people. Mon, like the related Khmer language, but unlike most languages in mainland Southeast Asia, is not tonal. The Mon language is a recognised indigenous language in Myanmar as well as an indigenous language of Thailand.

Mon was classified as a "vulnerable" language in UNESCO's 2010 Atlas of the World’s Languages in Danger. The Mon language has faced assimilative pressures in both Myanmar and Thailand, where many individuals of Mon descent are now monolingual in Burmese or Thai respectively. In 2007, Mon speakers were estimated to number between 1,800,000 and 2 million. In Myanmar, the majority of Mon speakers live in Southern Myanmar, especially Mon State, followed by Tanintharyi Region and Kayin State.

Mon is an important language in Burmese history. Until the 12th century, it was the lingua franca of the Irrawaddy valley—not only in the Mon kingdoms of the lower Irrawaddy but also of the upriver Pagan Kingdom of the Bamar people. Mon, especially written Mon, continued to be a prestige language even after the fall of the Mon kingdom of Thaton to Pagan in 1057. King Kyansittha of Pagan (r. 1084–1113) admired Mon culture and the Mon language was patronized.

Kyansittha left many inscriptions in Mon. During this period, the Myazedi inscription, which contains identical inscriptions of a story in Pali, Pyu, Mon and Burmese on the four sides, was carved. However, after Kyansittha's death, usage of the Mon language declined among the Bamar and the Burmese language began to replace Mon and Pyu as a lingua franca.

Mon inscriptions from Dvaravati's ruins also litter Thailand. However it is not clear if the inhabitants were Mon, a mix of Mon and Malay or Khmer. Later inscriptions and kingdoms like Lavo were subservient to the Khmer Empire.

After the fall of Pagan, Mon again became the lingua franca of the Hanthawaddy kingdom (1287–1539) in present-day Lower Myanmar, which remained a predominantly Mon-speaking region until the 1800s, by which point, the Burmese language had expanded its reach from its traditional heartland in Upper Burma into Lower Burma.

The region's language shift from Mon to Burmese has been ascribed to a combination of population displacement, intermarriage, and voluntary changes in self-identification among increasingly Mon–Burmese bilingual populations in throughout Lower Burma. The shift was certainly accelerated by the fall of the Mon-speaking Restored Hanthawaddy Kingdom in 1757. Following the fall of Pegu (now Bago), many Mon-speaking refugees fled and resettled in what is now modern-day Thailand. By 1830, an estimated 90% of the population in the Lower Burma self-identified as Burmese-speaking Bamars; huge swaths of former Mon-speaking areas, from the Irrawaddy Delta upriver, spanning Bassein (now Pathein) and Rangoon (now Yangon) to Tharrawaddy, Toungoo, Prome (now Pyay) and Henzada (now Hinthada), were now Burmese-speaking. Great Britain's gradual annexation of Burma throughout the 19th century, in addition to concomitant economic and political instability in Upper Burma (e.g., increased tax burdens to the Burmese crown, British rice production incentives, etc.) also accelerated the migration of Burmese speakers from Upper Burma into Lower Burma.

The Mon language has influenced subtle grammatical differences between the varieties of Burmese spoken in Lower and Upper Burma. In Lower Burmese varieties, the verb ပေး ("to give") is colloquially used as a permissive causative marker, like in other Southeast Asian languages, but unlike in other Tibeto-Burman languages. This usage is hardly employed in Upper Burmese varieties, and is considered a sub-standard construct.