Bhasini (भाषिणी)

A multilingual Indic typing editor for all 22 scheduled languages of India, built with Blazor WebAssembly. Everything runs in the browser; no server round-trips while you type.

It grew out of the Kannada Nudi web editor (KannadaNudiEditor/KannadaNudiWeb) and keeps its shape: a Quill rich-text editor whose keystrokes are transliterated by a C# engine.

Languages

Language	Script
Assamese	Bengali-Assamese (ৰ, ৱ)
Bengali	Bengali
Bodo	Devanagari
Dogri	Devanagari
Gujarati	Gujarati
Hindi	Devanagari
Kannada	Kannada
Kashmiri	Perso-Arabic (RTL), also Devanagari
Konkani	Devanagari
Maithili	Devanagari
Malayalam	Malayalam (chillus, Mozhi-style keys)
Manipuri	Meetei Mayek (lonsum letters), also Bengali
Marathi	Devanagari (ळ)
Nepali	Devanagari
Odia	Odia
Punjabi	Gurmukhi (tippi, bindi, addak)
Sanskrit	Devanagari
Santali	Ol Chiki
Sindhi	Perso-Arabic (RTL), also Devanagari
Tamil	Tamil (ந/ன by context, ற, ழ)
Telugu	Telugu
Urdu	Perso-Arabic, Nastaliq (RTL)

Plus English (no transliteration).

Features

Phonetic typing: type how it sounds (namaste → नमस्ते, vaNakkam → வணக்கம், aadaab → آداب). ITRANS/Baraha-style keys: capitals for retroflex/long sounds (T D N L Sh A I U E O), M anusvara, H visarga, .h explicit virama, _ to stop letters joining, | / || danda.
InScript: the government-standard layout for every Brahmic script.
F9 switches between the selected language and English.
Key map panel for the current language and method. Tap a letter to insert it, which also helps on phones.
Native digits toggle (१२३, ௧௨௩, ۱۲۳, …).
Convert: rewrite text from one Indian script to another, or turn romanised text into script.
Dictation through the browser's speech recognition (Chrome and Edge, where the locale is supported).
Open .txt / .docx, save as .docx, .txt or .html. Settings are remembered per browser.

How it works

src/Bhasini.Core has no web dependencies:

Input/BrahmicPhoneticEngine turns Latin keys into Devanagari, with a per-language PhoneticProfile (Dravidian short e/o, word-final virama, Tamil nasals, local key conventions).
Scripts/OffsetScriptMapper maps Devanagari into each ISCII-derived Unicode block by offset. Letters a script lacks fall back to the nearest letter. Script-specific spelling rules (Malayalam chillus, Gurmukhi tippi/addak, Bengali য়) run as post-processing.
Scripts/MeeteiMayekMapper handles Meetei Mayek. Input/SequenceEngine handles the alphabetic scripts (Perso-Arabic with word-initial/final forms, and Ol Chiki).
Input/TypingSession keeps the Latin keys of the current word and re-renders the whole word on every key, returning a minimal { delete, insert } edit for the editor.

src/Bhasini.Web is the Blazor WebAssembly app. wwwroot/js/editor.js intercepts keys in Quill and calls the session synchronously.

Run

Requires the .NET 8 SDK.

dotnet run --project src/Bhasini.Web

dotnet test

Docker (nginx serving the published static files on port 5000):

docker build -t bhasini .

Script fonts come from Google Fonts (Noto). When offline, the editor falls back to system fonts such as Nirmala UI on Windows.

Support Bhasini

Bhasini is free to use. If it helps you, please consider sponsoring its development:

Windows app

BhasiniWindows/ packages Bhasini as a Windows desktop app and Microsoft Store AppX. It adds Global mode: press F9 to type the selected Indian language in any application.

Bhasini (भाषिणी)