Learning from Scarcity: Building and Benchmarking Speech Technology for Sukuma.

Macton Mgonzo, Kezia Oketch, Naome A Etori, Winnie Mang'eni, Elizabeth Fabian Nyaki, Michael Samwel Mollel


Abstract
Automatic Speech Recognition (ASR) systems are gaining increasing attention in both academia and industry. Despite having remarkable performance in high-resource languages, their efficacy is less pronounced in low-resource settings. We present the first ASR system for Sukuma, one of the most severely under-resourced Tanzanian languages, and provide an open-source Sukuma speech corpus comprising 7.47 hours of carefully transcribed audio. The data, sourced primarily from Bible readings, was rigorously annotated to ensure phonetic and orthographic consistency, making it the most linguistically reliable resource currently available for the Sukuma language. To establish baselines, we train lightweight ASR and Text-to-Speech (TTS) models that demonstrate the feasibility of building end-to-end speech systems for this underrepresented language. This work addresses the challenges of developing language and communication tools for speakers of less-represented languages, particularly the scarcity of representative datasets and benchmarks, and highlights future research directions for linguistically challenging languages, such as Sukuma. We make our data and code publicly available to facilitate reproducibility and further research.
Anthology ID:
2026.loreslm-1.25
Volume:
Proceedings of the Second Workshop on Language Models for Low-Resource Languages (LoResLM 2026)
Month:
March
Year:
2026
Address:
Rabat, Morocco
Editors:
Hansi Hettiarachchi, Tharindu Ranasinghe, Alistair Plum, Paul Rayson, Ruslan Mitkov, Mohamed Gaber, Damith Premasiri, Fiona Anting Tan, Lasitha Uyangodage
Venue:
LoResLM
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
288–296
Language:
URL:
https://aclanthology.org/2026.loreslm-1.25/
DOI:
Bibkey:
Cite (ACL):
Macton Mgonzo, Kezia Oketch, Naome A Etori, Winnie Mang'eni, Elizabeth Fabian Nyaki, and Michael Samwel Mollel. 2026. Learning from Scarcity: Building and Benchmarking Speech Technology for Sukuma.. In Proceedings of the Second Workshop on Language Models for Low-Resource Languages (LoResLM 2026), pages 288–296, Rabat, Morocco. Association for Computational Linguistics.
Cite (Informal):
Learning from Scarcity: Building and Benchmarking Speech Technology for Sukuma. (Mgonzo et al., LoResLM 2026)
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PDF:
https://aclanthology.org/2026.loreslm-1.25.pdf