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languagebench

FAIR Forward / Datenlabor BMZ (GIZ)
open source / Overall score: 2.0

Languagebench is an auto-updating multilingual leaderboard and harness that tracks frontier language models across the world's languages, with a deliberate focus on low-resource ones. It runs seven tasks - bidirectional translation, classification, MMLU, ARC, TruthfulQA and MGSM - over about forty models via OpenRouter, drawing on FLORES+, Global-MMLU, AfriMMLU, AfriMGSM and Uhura-TruthfulQA and machine-translating English-only sets where none exists. Results publish to a Hugging Face Space with a global proficiency map, plus two datasets of aggregated and per-sample tables.

Named the AI Language Proficiency Monitor in the 2025 paper and renamed languagebench since; the repository keeps the older evals-for-every-language name and the Space resolves under both. Built by the BMZ Data Lab with GIZ's FAIR Forward programme and DFKI.

Openness

5 high confidence
5.0
license
MIT(OSI)
source
public(GitHub)
core features withheld
no

Languagebench is MIT-licensed, with the stock license text and no appended terms. Its evaluation pipeline, FastAPI backend and React frontend all ship in one repository that the Hugging Face Space builds from, the result tables publish as open datasets, and no pricing, paid tier or license key appears anywhere in it.

Adoption

1 high confidence
1.0

There is no installable package for languagebench: it is a hosted leaderboard and the pipeline behind it, so the closest measurable artifacts are the two Hugging Face result datasets the README names as the programmatic access path. Downloads on those datasets are low, and the repository's GitHub stars, forks and the Space's likes all point the same direction.

Capability

3 medium confidence
3.0

Languagebench covers more languages than any harness in the category, up to 200 against EuroEval's 30-plus, but its task surface is narrow: seven borrowed benchmarks run only against hosted models through a single router. EuroEval trades that language breadth for support across encoders, decoders and encoder-decoders and its own dataset-creation scripts, leaving the two roughly comparable, and general-purpose harnesses still cover more ground than either.

  • https://arxiv.org/abs/2507.08538 recorded 2026-09-10

    "a comprehensive multilingual benchmark that systematically assesses LLM performance across up to 200 languages, with a particular focus on low-resource languages"; aggregates translation, question answering, math and reasoning over FLORES+, MMLU, GSM8K, TruthfulQA and ARC; "an open-source, auto-updating leaderboard and dashboard"; a global proficiency map and trends over time

  • https://raw.githubusercontent.com/datenlabor-bmz/evals-for-every-language/main/notes/system-architecture-diagram.md recorded 2026-09-10

    seven task functions (translation_from/to with BLEU+ChrF, classification, mmlu, arc, truthfulqa, mgsm), a static curated list of ~42 models filtered to a default top 40 through OpenRouter, languages sorted by speaker count with a 1000-language default ceiling, 10 samples per model x language x task, and bootstrap confidence intervals on the aggregate

Verified 2026-09-10