Khmer Alphabet

The Khmer alphabet has 33 consonant letters and 24 vowel signs ^[1], plus 16 independent vowel letters used at the start of syllables — making Khmer one of the largest scripts in the world by total letter count.

The script is a Brahmic abugida, meaning each consonant carries an inherent vowel that is modified by attached vowel diacritics.

Khmer is spoken by approximately 16 million people natively ^[3] in Cambodia, where it is the sole official language. Additional speakers live in Vietnam's Mekong Delta region, Thailand, and diaspora communities worldwide.

The Ministry of Education, Youth and Sport of Cambodia oversees Khmer-medium instruction at all levels of the education system.

Khmer belongs to the Austroasiatic language family, specifically the Mon-Khmer branch ^[2]. Its closest relatives include Mon (Myanmar/Thailand), Pearic languages of Cambodia, and more distantly the Munda languages of India and Vietnamese.

Austroasiatic is one of the oldest language groups in Southeast Asia, with evidence suggesting it spread from present-day China or Southeast Asia thousands of years ago.

The Khmer consonant register system is one of its most distinctive features ^[1]. Each of the 33 consonants belongs to one of two series:

• First series (a-series) — consonants with inherent vowel /a/ (e.g., ក, ត, ប)

• Second series (o-series) — consonants with inherent vowel /o/ (e.g., គ, ទ, ព)

The same vowel sign, when attached to a first-series or second-series consonant, produces different vowel sounds. This means learners must memorize both the consonant and its register to read correctly.

The Khmer script developed during the early centuries of the Common Era ^[1] from Indian Brahmi script, transmitted via the Pallava and Grantha scripts through Sanskrit trade networks. The oldest known Khmer inscriptions date from the 7th century CE at Angkor Borei.

The script evolved considerably through the Angkor period (9th–15th centuries) and has remained relatively stable since then.

No — Khmer is written without spaces between words ^[1], similar to ancient Sanskrit and other Brahmic traditions. Spaces separate phrases, clauses, or sentences — not individual words.

Readers recognise word boundaries from context and knowledge of the language. This is characteristic of many Southeast Asian scripts, including Thai and Lao.

Khmer has its own numeral set (០ ១ ២ ៣ ៤ ៥ ៦ ៧ ៨ ៩) ^[1] descended from ancient Brahmi numerals — the same ancestral system that gave rise to the Arabic numerals used worldwide. Khmer numerals appear in formal documents, religious texts, and traditional contexts.

In everyday commerce, digital communication, and modern media, Western Arabic numerals (0–9) are also widely used alongside Khmer numerals.

Khmer is the official medium of instruction in all Cambodian public schools ^[3] from Grade 1 onwards. Children begin learning the Khmer consonants (ព្យញ្ជនៈ) and vowel signs in their first year.

The Ministry of Education, Youth and Sport (MoEYS) develops all Khmer-medium curricula and textbooks. Khmer language and literature remain core subjects throughout primary and secondary education.