Adja-French Parallel Corpus: A New Resource for Machine Translation of a West African Under-Resourced Language

Josue Frejus Godeme; Rolando Coto-Solano

doi:10.63317/5bk4g2k7mpmu

Adja-French Parallel Corpus: A New Resource for Machine Translation of a West African Under-Resourced Language

Josue Frejus Godeme, Rolando Coto-Solano

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Abstract

We present the first parallel text corpus for Adja machine translation, an under-resourced Gbe language spoken by approximately 1,000,000 people in Benin and Togo. The corpus contains 10,000 French-Adja sentence pairs, providing a foundation for machine translation research. We establish baseline results using fine-tuned NLLB and ByT5 models, achieving a chrF++ of 28 in the French→Adja direction, and up to a chrF++ of 34 in the Adja→French direction. This work represents the first public machine translation resource for Adja. It provides benchmarks for future studies on this under-resourced West African language. The dataset is available at https://huggingface.co/datasets/JosueG/french-adja-parallel-corpus.

Anthology ID:: 2026.lrec-1.299
Volume:: Proceedings of the Fifteenth Language Resources and Evaluation Conference
Month:: May
Year:: 2026
Address:: Palma de Mallorca, Spain
Editors:: Stelios Piperidis, Núria Bel, Henk van den Heuvel, Nancy Ide, Simon Krek, Antonio Toral
Venue:: LREC
SIG:
Publisher:: ELRA Language Resource Association
Note:
Pages:: 3742–3749
Language:
External URL:: https://lrec.elra.info/lrec2026-main-299
DOI:: 10.63317/5bk4g2k7mpmu
Bibkey:
Cite (ACL):: Josue Frejus Godeme and Rolando Coto-Solano. 2026. Adja-French Parallel Corpus: A New Resource for Machine Translation of a West African Under-Resourced Language. In Proceedings of the Fifteenth Language Resources and Evaluation Conference, pages 3742–3749, Palma de Mallorca, Spain. ELRA Language Resource Association.
Cite (Informal):: Adja-French Parallel Corpus: A New Resource for Machine Translation of a West African Under-Resourced Language (Godeme & Coto-Solano, LREC 2026)
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@inproceedings{godeme-coto-solano-2026-adja,
    title = "Adja-{F}rench Parallel Corpus: A New Resource for Machine Translation of a {W}est {A}frican Under-Resourced Language",
    author = "Godeme, Josue Frejus  and
      Coto-Solano, Rolando",
    editor = "Piperidis, Stelios  and
      Bel, N{\'u}ria  and
      van den Heuvel, Henk  and
      Ide, Nancy  and
      Krek, Simon  and
      Toral, Antonio",
    booktitle = "Proceedings of the Fifteenth Language Resources and Evaluation Conference",
    month = may,
    year = "2026",
    address = "Palma de Mallorca, Spain",
    publisher = "ELRA Language Resource Association",
    url = "https://aclanthology.org/2026.lrec-1.299/",
    doi = "10.63317/5bk4g2k7mpmu",
    pages = "3742--3749",
    abstract = "We present the first parallel text corpus for Adja machine translation, an under-resourced Gbe language spoken by approximately 1,000,000 people in Benin and Togo. The corpus contains 10,000 French-Adja sentence pairs, providing a foundation for machine translation research. We establish baseline results using fine-tuned NLLB and ByT5 models, achieving a chrF++ of 28 in the French{\textrightarrow}Adja direction, and up to a chrF++ of 34 in the Adja{\textrightarrow}French direction. This work represents the first public machine translation resource for Adja. It provides benchmarks for future studies on this under-resourced West African language. The dataset is available at \url{https://huggingface.co/datasets/JosueG/french-adja-parallel-corpus}."
}

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%0 Conference Proceedings
%T Adja-French Parallel Corpus: A New Resource for Machine Translation of a West African Under-Resourced Language
%A Godeme, Josue Frejus
%A Coto-Solano, Rolando
%Y Piperidis, Stelios
%Y Bel, Núria
%Y van den Heuvel, Henk
%Y Ide, Nancy
%Y Krek, Simon
%Y Toral, Antonio
%S Proceedings of the Fifteenth Language Resources and Evaluation Conference
%D 2026
%8 May
%I ELRA Language Resource Association
%C Palma de Mallorca, Spain
%F godeme-coto-solano-2026-adja
%X We present the first parallel text corpus for Adja machine translation, an under-resourced Gbe language spoken by approximately 1,000,000 people in Benin and Togo. The corpus contains 10,000 French-Adja sentence pairs, providing a foundation for machine translation research. We establish baseline results using fine-tuned NLLB and ByT5 models, achieving a chrF++ of 28 in the French→Adja direction, and up to a chrF++ of 34 in the Adja→French direction. This work represents the first public machine translation resource for Adja. It provides benchmarks for future studies on this under-resourced West African language. The dataset is available at https://huggingface.co/datasets/JosueG/french-adja-parallel-corpus.
%R 10.63317/5bk4g2k7mpmu
%U https://aclanthology.org/2026.lrec-1.299/
%U https://doi.org/10.63317/5bk4g2k7mpmu
%P 3742-3749

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Markdown (Informal)

[Adja-French Parallel Corpus: A New Resource for Machine Translation of a West African Under-Resourced Language](https://aclanthology.org/2026.lrec-1.299/) (Godeme & Coto-Solano, LREC 2026)

Adja-French Parallel Corpus: A New Resource for Machine Translation of a West African Under-Resourced Language (Godeme & Coto-Solano, LREC 2026)

ACL

Josue Frejus Godeme and Rolando Coto-Solano. 2026. Adja-French Parallel Corpus: A New Resource for Machine Translation of a West African Under-Resourced Language. In Proceedings of the Fifteenth Language Resources and Evaluation Conference, pages 3742–3749, Palma de Mallorca, Spain. ELRA Language Resource Association.