Language Heritage · Social Impact
The Cambridge technologist who built a $50 device to save a language with no written script
Arjuna Sathiaseelan, Sarbani Banerjee Belur · Southern India (Soliga Indigenous community); project led from Cambridge University, UK and IIIT Dharwad, India
Soliga has no written script, and as young people left for city jobs the elders worried it would go quiet. A Cambridge University technologist and an IIIT Dharwad professor built the community a working voice model from five hours of recordings, running offline on hardware that costs less than $50.
The person and the place
Arjuna Sathiaseelan, founder of the Saving Voices Project and CTO of the Frugal AI Hub at Cambridge University, working with Sarbani Banerjee Belur, co-founder and assistant professor at IIIT Dharwad, alongside the Soliga Indigenous community in southern India.
The problem Arjuna and Sarbani cared about
Soliga has no written script. Young people were leaving for city jobs, and the elders could see what that meant for a language that lives only in speech. Commercial speech technology was never built with a language like this in mind.
The agency moment
Rather than wait for a commercial speech-AI vendor to take an interest in an unwritten Indigenous language, Sathiaseelan and Belur built a custom offline text-to-speech system from scratch, using just five hours of recorded Soliga voice. The recordings never left the community's own devices, "something that simply isn't possible with closed cloud systems," Sathiaseelan said.
What changed
The model lives on a Raspberry Pi that costs less than $50 and keeps working offline for long stretches. The word error rate in these models still runs a little high, but "what we gained is complete data sovereignty, offline deployment on sub-$50 hardware, and a governance structure that elders and community leaders actually trust," Sathiaseelan said.
The move worth copying
They didn't wait for Big Tech to make room for a language with no written script. They built the room themselves, for less than the cost of a dinner out. A Raspberry Pi and under fifty dollars. The bar for building something for a language, or a place, that big tech has skipped is lower than it looks.
"With just five hours of voice data, we were able to build a voice model for the Soliga by prioritizing community ownership, and with frugal, deployable technology." — Arjuna Sathiaseelan, Rest of World
Sources
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