Devanagari
East Asia

In the 7th century, under the rule of Songtsen Gampo of the Tibetan Empire, Thonmi Sambhota was sent to Nepal to open marriage negotiations with a Nepali princess and to find a writing system suitable for the Tibetan language. He then invented the Tibetan script based on the Nāgarī used in Kashmir. He added 6 new characters for sounds that did not exist in Sanskrit.

Other scripts closely related to Nāgarī (such as Siddhaṃ) were introduced throughout East and Southeast Asia from the 7th to the 10th centuries CE: notably in Indonesia, Vietnam, and Japan.

Most of the Southeast Asian scripts have roots in Dravidian scripts, but a few found in south-central regions of Java and isolated parts of southeast Asia resemble Devanāgarī or its prototypes. The Kawi script in particular is similar to the Devanāgarī in many respects, though the morphology of the script has local changes. The earliest inscriptions in the Devanāgarī-like scripts are from around the 10th century CE, with many more between the 11th and 14th centuries.

Some of the old-Devanāgarī inscriptions are found in Hindu temples of Java, such as the Prambanan temple. The Ligor and the Kalasan inscriptions of central Java, dated to the 8th century, are also in the Nāgarī script of north India. According to the epigraphist and Asian Studies scholar Lawrence Briggs, these may be related to the 9th century copper plate inscription of Devapaladeva (Bengal) which is also in early Devanāgarī script. The term kawi in Kawi script is a loan word from kāvya (poetry). According to anthropologists and Asian studies scholars John Norman Miksic and Goh Geok Yian, the 8th century version of early Nāgarī or Devanāgarī script was adopted in Java, Bali, and Khmer around the 8th–9th centuries, as evidenced by the many contemporaneous inscriptions of this period.
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