| | --- |
| | language: |
| | - eu |
| | configs: |
| | - config_name: wikipedia |
| | data_files: |
| | - split: train |
| | path: wikipedia/train*.jsonl.gz |
| | - split: validation |
| | path: wikipedia/valid*.jsonl.gz |
| | - split: test |
| | path: wikipedia/test*.jsonl.gz |
| | - config_name: euscrawl-v2 |
| | data_files: |
| | - split: train |
| | path: euscrawl-v2-free/train*.jsonl.gz |
| | - split: validation |
| | path: euscrawl-v2-free/valid*.jsonl.gz |
| | - split: test |
| | path: euscrawl-v2-free/test*.jsonl.gz |
| | - config_name: zelaihandi |
| | data_files: |
| | - split: train |
| | path: zelaihandi/train*.jsonl.gz |
| | - split: validation |
| | path: zelaihandi/valid*.jsonl.gz |
| | - split: test |
| | path: zelaihandi/test*.jsonl.gz |
| | - config_name: bog |
| | data_files: |
| | - split: train |
| | path: bog/train*.jsonl.gz |
| | - split: validation |
| | path: bog/valid*.jsonl.gz |
| | - split: test |
| | path: bog/test*.jsonl.gz |
| | - config_name: bopv |
| | data_files: |
| | - split: train |
| | path: bopv/train*.jsonl.gz |
| | - split: validation |
| | path: bopv/valid*.jsonl.gz |
| | - split: test |
| | path: bopv/test*.jsonl.gz |
| | - config_name: botha |
| | data_files: |
| | - split: train |
| | path: botha/train*.jsonl.gz |
| | - split: validation |
| | path: botha/valid*.jsonl.gz |
| | - split: test |
| | path: botha/test*.jsonl.gz |
| | - config_name: parleus |
| | data_files: |
| | - split: train |
| | path: parleus/train*.jsonl.gz |
| | - split: validation |
| | path: parleus/valid*.jsonl.gz |
| | - split: test |
| | path: parleus/test*.jsonl.gz |
| | - config_name: aldizkariak |
| | data_files: |
| | - split: train |
| | path: aldizkariak/train*.jsonl.gz |
| | - split: validation |
| | path: aldizkariak/valid*.jsonl.gz |
| | - split: test |
| | path: aldizkariak/test*.jsonl.gz |
| | - config_name: cultura-x |
| | data_files: |
| | - split: train |
| | path: cultura-x/train*.jsonl.gz |
| | - split: validation |
| | path: cultura-x/valid*.jsonl.gz |
| | - split: test |
| | path: cultura-x/test*.jsonl.gz |
| | - config_name: hplt-v2 |
| | data_files: |
| | - split: train |
| | path: hplt-v2/train*.jsonl.gz |
| | - split: validation |
| | path: hplt-v2/valid*.jsonl.gz |
| | - split: test |
| | path: hplt-v2/test*.jsonl.gz |
| | - config_name: finepdfs |
| | data_files: |
| | - split: train |
| | path: finepdfs/train*.jsonl.gz |
| | - split: validation |
| | path: finepdfs/valid*.jsonl.gz |
| | - split: test |
| | path: finepdfs/test*.jsonl.gz |
| | - config_name: fineweb2 |
| | data_files: |
| | - split: train |
| | path: fineweb2/train*.jsonl.gz |
| | - split: validation |
| | path: fineweb2/valid*.jsonl.gz |
| | - split: test |
| | path: fineweb2/test*.jsonl.gz |
| | - config_name: colossal-oscar |
| | data_files: |
| | - split: train |
| | path: colossal-oscar/train*.jsonl.gz |
| | - split: validation |
| | path: colossal-oscar/valid*.jsonl.gz |
| | - split: test |
| | path: colossal-oscar/test*.jsonl.gz |
| | - config_name: hplt-v1 |
| | data_files: |
| | - split: train |
| | path: hplt-v1/train*.jsonl.gz |
| | - split: validation |
| | path: hplt-v1/valid*.jsonl.gz |
| | - split: test |
| | path: hplt-v1/test*.jsonl.gz |
| | task_categories: |
| | - fill-mask |
| | - text-generation |
| | task_ids: |
| | - language-modeling |
| | - masked-language-modeling |
| | annotations_creators: |
| | - no-annotation |
| | multilinguality: |
| | - monolingual |
| | --- |
| | # Latxa Corpus v2 |
| |
|
| | - 📧 **Point of Contact:** hitz@ehu.eus |
| |
|
| | ## Dataset Summary |
| |
|
| | - **Curated by:** HiTZ Research Center & IXA Research group (University of the Basque Country UPV/EHU) |
| | - **Language(s):** eu-ES |
| | |
| | Latxa Corpus v2 is a large-scale monolingual Basque corpus, created by combining curated crawls, public datasets, institutional data, and newly collected resources. |
| | Compared to [v1.1](https://huggingface.co/datasets/HiTZ/latxa-corpus-v1.1), it substantially increases coverage, diversity, and volume. |
| | The final corpus is deduplicated, filtered, and ready for language model pretraining. |
| |
|
| | <div style="background-color:#e8f4fd; border-left:4px solid #1e88e5; padding:12px 16px; border-radius:6px; margin:16px 0;"> |
| | <strong>📌 Notice</strong><br> |
| | As of <strong>February 13th 2026</strong>, this repository reflects a curated version of the original dataset. |
| | Some data points have been removed to ensure permission compliance. |
| | Researchers with a legitimate need for access to the original data may contact the maintainers for further information. |
| | </div> |
| |
|
| | ## Data Sources |
| |
|
| | - **Euscrawl v2**: An updated version of [EusCrawl v1](https://www.ixa.eus/euscrawl/) ([Artetxe et al., 2022](https://doi.org/10.18653/v1/2022.emnlp-main.499)), including new content up to November 2025. |
| | - **ZelaiHandi**: A subset of the [ZelaiHandi](https://huggingface.co/datasets/orai-nlp/ZelaiHandi) corpus. |
| | - **BOPV**: The official gazette of the Basque Government (https://opendata.euskadi.eus/api-bopv/?api=bopv). |
| | - **BOG**: The official gazette of the Provincial Council of Gipuzkoa (https://egoitza.gipuzkoa.eus/es/bog). |
| | - **BOTHA**: The official gazette of the Provincial Council of Álava (https://www.araba.eus/botha). |
| | - **ParlEus**: Transcriptions of Basque Parliament sessions, extracted and reconstructed from PDFs (https://www.legebiltzarra.eus). |
| | - **Aldizkariak**: Basque academic journals processed from PDF sources: |
| | - Ekaia: https://ojs.ehu.eus/index.php/ekaia |
| | - Gogoa: https://ojs.ehu.eus/index.php/Gogoa |
| | - Tantak: https://ojs.ehu.eus/index.php/Tantak |
| | - Ekonomiaz: https://www.euskadi.eus/web01-a2reveko/es/k86aEkonomiazWar/ekonomiaz |
| | - Uztaro: https://aldizkariak.ueu.eus/index.php/uztaro |
| | - IkerGazte: https://www.ueu.eus/ikergazte/2025/artikuluak/argitalpenak |
| | - **Wikipedia**: Basque Wikipedia's [dump](https://dumps.wikimedia.org/) from September 2025. |
| | - **CulturaX**: The Basque portion of the [CulturaX](https://huggingface.co/datasets/uonlp/CulturaX) corpus ([Nguyen et al., 2023](https://arxiv.org/abs/2309.09400)). |
| | - **Colossal OSCAR**: The Basque portion of several [Colossal OSCAR](https://huggingface.co/datasets/oscar-corpus/colossal-oscar-1.0) releases. |
| | - **FineWeb2**: The Basque portion of the [FineWeb2](https://huggingface.co/datasets/HuggingFaceFW/fineweb) corpus ([Penedo et al., 2024](https://openreview.net/forum?id=n6SCkn2QaG)). |
| | - **FinePDFs**: The Basque portion of the [FinePDFs](https://huggingface.co/datasets/HuggingFaceFW/finepdfs) corpus. |
| | - **HPLT v1 & v2**: The Basque portion of the [HPLT v1](https://hplt-project.org/datasets/v1) ([Aulamo et al., 2023](https://aclanthology.org/2023.eamt-1.61)) and [HPLT v2](https://hplt-project.org/datasets/v2.0) corpora. |
| |
|
| | ## Data Statistics |
| |
|
| | The size of each dataset in terms of number of documents can be found below: |
| |
|
| | | | Train | Valid | Test | |
| | |:---------------|----------:|-------:|-------:| |
| | | Aldizkariak | 3,260 | 33 | 33 | |
| | | BOG | 169,665 | 1,731 | 1,731 | |
| | | BOPV | 42,798 | 437 | 887 | |
| | | BOTHA | 92,249 | 941 | 941 | |
| | | Colossal OSCAR | 89,856 | 915 | 915 | |
| | | CulturaX | 870,464 | 8,882 | 8,882 | |
| | | Euscrawl v2 | 1,636,010 | 16,682 | 17,097 | |
| | | FinePDFs | 277,572 | 2,803 | 837 | |
| | | FineWeb2 | 341,296 | 3,482 | 3,482 | |
| | | HPLT v1 | 894,590 | 9,128 | 9,128 | |
| | | HPLT v2 | 567,503 | 5,790 | 5,790 | |
| | | ParlEus | 22,818 | 231 | 560 | |
| | | Wikipedia | 456,273 | 4,655 | 4,655 | |
| | | ZelaiHandi | 189,975 | 1,938 | 1,938 | |
| |
|
| |
|
| | ## Licensing |
| |
|
| | We do not claim ownership of any document in the corpus. Should you consider that our data contains material that is owned by you and you would not like to be reproduced here, please contact us at hitz@ehu.eus. |
| | For detailed information regarding the licenses associated with each individual corpus and document comprising this training dataset, please refer to the "license" field within "meta" or the respective references listed alongside each corpus entry. |
| |
|
| | ## Funding |
| |
|
| | This work is funded by the Basque Government (IKER-GAITU project) and the Ministerio para la Transformación Digital y de la Función Pública - Funded by EU – NextGenerationEU within the framework of the project ILENIA with reference 2022/TL22/00215335 and within the framework of the project Desarrollo de Modelos ALIA. |
