SignBridge
GHANAIAN SIGN LANGUAGE · ENGLISH · TWI · GA · EWE

Breaking barriers
through sign.

SignBridge translates Ghanaian Sign Language to English and Twi — live, in your browser, with no data leaving your device.

Start translatingLearn signs
Sign detected
hello
Hello
English output ready
Sign detected
help
Boa me
Twi output ready
Sign detected
sorry
Kɛ kɛ mi
Ga output ready
Sign detected
goodbye
De Nyuie
Ewe output ready
10
Core GSL signs supported
Growing library
2
Output languages
English & Twi
<1s
Average detection latency
MediaPipe, 25–30fps
0
Bytes uploaded to any server
100% on-device processing
The problem

A community left
without language

Over 470,000 Ghanaians live with hearing loss — yet Ghana has no formal sign language policy, no system-wide interpreter training, and no assistive tools in most schools. Deaf students attend classrooms where teachers cannot communicate with them. Families resort to improvised gestures that no one else understands. Researchers describe this as a "linguistic vacuum": deaf children arrive at school without a first language, and leave unable to participate fully in society.

90%+
of deaf children in Ghana are born to hearing parents — the communication gap starts at birth, before school even begins
Source: Ghana National Association of the Deaf
0
Formal GSL policy — a "null policy" context
Univ. of Toronto, 2024
16
Schools for the deaf serving the entire country
GNAD
How it works

Three steps.
No setup required.

01
Show your hand
Hold a GSL sign in front of your camera. MediaPipe tracks 21 hand landmarks in real time at 25–30fps.
Camera
02
SignBridge reads it
Our classifier matches your hand shape to a known GSL sign — all running locally, zero upload.
On-device AI
03
Hear it in your language
The sign is spoken aloud in English or translated to Twi via GhanaNLP and read out loud.
Khaya TTS
What you can do

Three ways to
use SignBridge

Sign → Text
/translate
Point your camera at a GSL signer and get instant English + Twi translation.
Start translating
Learn GSL
/learn
10 core GSL signs with GIF demonstrations and live camera practice.
Browse lessons
Text → Sign
/speak
Type a word or phrase and see the matching GSL GIFs instantly.
Try it
Who we serve

Built for real people
in real situations

Deaf students
Access core vocabulary in GSL with audio output in English and Twi — no interpreter needed.
Teachers & families
Learn the most common GSL signs to communicate with deaf students and family members.
Healthcare & public services
Bridge the gap in hospitals and government offices where sign language interpreters are unavailable.
The bigger picture

A continent-wide
communication crisis

Across Africa, 40 million people live with significant hearing loss. Most have no access to sign language education, certified interpreters, or assistive tools. SignBridge is a first step toward changing that — starting with Ghana.

40M+
Africans with hearing loss
Ghana
Home to 470K+ deaf and hard-of-hearing people with limited support infrastructure.
Interpreters
Fewer than 50 certified GSL interpreters for a country of 33 million.
AI tools
SignBridge uses browser-native AI — no server, no account, no cost.

Your camera never leaves your device. All hand tracking runs locally via WebAssembly — nothing is uploaded or stored. No account required.