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MultiGEC is a dataset for Multilingual Grammatical Error Correction in 12 European languages (Czech, English, Estonian, German, Greek, Icelandic, Italian, Latvian, Russian, Slovene, Swedish and Ukrainian) compiled by the CompSLA working group and over 20 external data providers in the context of MultiGEC-2025, the first text-level GEC shared task.
The MultiGEC dataset is divided into 17 subcorpora covering different languages, domains and correction styles, summarized below. More detailed information about each subcorpus is available with the data as machine-readable metadata, whose format is described here. See also the full dataset statistics.
| language code | subcorpus | learners | # essays (train) | # essays (dev) | # essays (test) | # essays (total) | hypothesis sets | minimal | fluency | peculiarities |
|---|---|---|---|---|---|---|---|---|---|---|
| cs | NatWebInf | L1 (web) | 3620 | 1291 | 1256 | 6167 | 2 | ✓ | ||
| cs | Romani | L1 (Romani children) | 3247 | 179 | 173 | 3599 | 2 | ✓ | ||
| cs | SecLearn | L2 | 2057 | 173 | 177 | 2407 | 2 | ✓ | ||
| cs | NatForm | L1 (students) | 227 | 88 | 76 | 391 | 2 | ✓ | ||
| en | Write & Improve | L2 | 4040 | 506 | 504 | 5050 | 1 | ✓ | separate download | |
| et | EIC | L2 | 206 | 26 | 26 | 258 | 3 | ✓ | ✓ | |
| et | EKIL2 | L2 | 1202 | 150 | 151 | 1503 | 2 | ✓ | ||
| de | Merlin | L2 | 827 | 103 | 103 | 1033 | 1 | ✓ | pre-tokenized | |
| el | GLCII | L2 | 1031 | 129 | 129 | 1289 | 1 | ✓ | ||
| is | IceEC | L1 (mixed) | 140 | 18 | 18 | 176 | 1 | ✓ | pre-tokenized | |
| is | IceL2EC | L2 | 155 | 19 | 19 | 193 | 1 | ✓ | pre-tokenized; includes text fragments | |
| it | Merlin | L2 | 651 | 81 | 81 | 813 | 1 | ✓ | ||
| lv | LaVA | L2 | 813 | 101 | 101 | 1015 | 1 | ✓ | ||
| ru | RULEC-GEC | mixed (L2 + heritage) | 2539 | 1969 | 1535 | 6043 | 3 | ✓ | ✓ | pre-tokenized; includes text fragments; separate download |
| sl | Solar-Eval | L1 (students) | 10 | 50 | 49 | 109 | 1 | ✓ | ||
| sv | SweLL_gold | L2 | 402 | 50 | 50 | 502 | 1 | ✓ | ||
| uk | UA-GEC | mixed (crowdsourced) | 1706 | 87 | 79 | 1872 | 4 | ✓ | ✓ |
The MultiGEC dataset is subject to the terms of use listed here. To get the data, go to the download page. A collection of scripts to work with MultiGEC data is avialable through GitHub.
Information on how to cite the dataset is available here. See also the list of MultiGEC-related publications.