Limbu Letter Ba

ᤒ marks an initial b and carries a built-in short vowel. In modern Limbu, that vowel is an open o, roughly like an “aw” sound. A vowel sign after the letter changes the syllable: ᤒᤠ uses ᤠ for the vowel “a.” The encoded label “ba” names the letter; it is not the usual reading of ᤒ on its own.

The Limbu script is also called Sirijanga, after a cultural hero credited with its invention. Limbu tradition says he rediscovered an older script. A Hodgson archive catalogue labels an alphabet book early 18th century, while the oldest known Limbu writings were collected in the 1850s. These records leave the script’s earliest history unsettled.

The modern script was revived in the 1920s and revised again in the 1960s. Its older recorded form used an inherent “a” vowel and did not distinguish voiced from unvoiced stops, so it had no separate b sign. The modern form added voiced letters such as ᤒ; later changes made it more familiar to Devanagari readers. The Limbu script is Brahmi-derived, while its Unicode encoding follows a Tibetan-style pattern for subjoined consonants. Limbu is also linguistically distant from Lepcha and Tibetan. Use of Limbu script to record oral tradition and write ritual texts, schoolbooks, and literature ties it to cultural memory and political self-expression. Limbu–Devanagari books grew more common since the 1990s.