Detalhes do Documento

Evaluating WMT 2025 Metrics shared task submissions on the SSA-MTE African challenge set

Autor(es): Li, Senyu ; Ali, Felermino D. M. A. ; Wang, Jiayi ; Sousa-Silva, Rui ; Cardoso, Henrique Lopes ; Stenetorp, Pontus ; Cherry, Colin ; Adelani, David Ifeoluwa

Data: 2025

Identificador Persistente: https://hdl.handle.net/10216/171030

Origem: Repositório Aberto da Universidade do Porto


Descrição

This paper presents the evaluation of submissions to the WMT 2025 Metrics Shared Task on the SSA-MTE challenge set, a large-scale benchmark for machine translation evaluation (MTE) in Sub-Saharan African languages. The SSA-MTE test sets contains over 12,768 human-annotated adequacy scores across 11 language pairs sourced from English, French, and Portuguese, spanning 6 commercial and open-source MT systems. Results show that correlations with human judgments remain generally low, with most systems falling below the 0.4 Spearman threshold for medium-level agreement. Performance varies widely across language pairs, with most correlations under 0.4; in some extremely low-resource cases, such as Portuguese-Emakhuwa, correlations drop to around 0.1, underscoring the difficulty of evaluating MT for very low-resource African languages. These findings highlight the urgent need for more research on robust, generalizable MT evaluation methods tailored for African languages.

Tipo de Documento Livro
Idioma Inglês
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