impresso-project/wiki_comparable_corpus_en_de_hi_it_ko_zh

Multilingual Wikipedia Comparable Corpus (en, de, it, ko, hi, zh)

This dataset is a document-level comparable corpus of Wikipedia articles across 6 languages: English (en), German (de), Italian (it), Korean (ko), Hindi (hi), and Chinese (zh).

The key property is alignment across languages: entries are topic-matched such that, for a given index i, dataset["en"][i] is comparable to dataset["de"][i], dataset["it"][i], … (and likewise via the aligned_id field).

Dataset structure

The dataset loads as a DatasetDict with one split per language:

• en: 11,527 rows
• de: 11,527 rows
• hi: 11,527 rows
• it: 11,527 rows
• ko: 11,527 rows
• zh: 11,527 rows

Aligned article groups: 11,527
Total articles: 11,527 × 6 = 69,162

Columns / features

Each language split has the same schema:

• wiki_pageid (int): Wikipedia page ID (curid) of the article in that language edition.
• language (string): Language code (en, de, it, ko, hi, zh).
• url (string): Canonical Wikipedia URL for the article.
• title (string): Article title.
• text (string): Article text.
• aligned_id (int): Alignment group identifier shared across languages.
• id (string): Language-specific identifier. (Can be used together with aligned_id / row index for alignment.)

Alignment guarantee (how to join)

Articles are aligned across splits in two equivalent ways:

1. By row index: for any i, the examples across all language splits at index i are aligned/comparable.
2. By aligned_id: examples that share the same aligned_id are aligned/comparable across languages.

Reconstruct Wikipedia curid

You can reconstruct a stable Wikipedia “curid” link from wiki_pageid: https://{language_code}.wikipedia.org/wiki/?curid={wiki_pageid}

• e.g. https://de.wikipedia.org/wiki/?curid=6679205

Example

Example entry from the German split (de):

{
  "wiki_pageid": 6679205,
  "language": "de",
  "url": "https://de.wikipedia.org/wiki/.in",
  "title": ".in",
  "text": ".in ist die länderspezifische Top-Level-Domain (ccTLD) Indiens. Sie wurde am 8. Mai 1989 ...",
  "aligned_id": 3,
  "id": "2de"
}

Citation

If you use this dataset, please cite it using the following BibTeX entry:

@misc{schuhmacher2026informationrepresentationfairnesslongdocument,
      title={Information Representation Fairness in Long-Document Embeddings: The Peculiar Interaction of Positional and Language Bias}, 
      author={Elias Schuhmacher and Andrianos Michail and Juri Opitz and Rico Sennrich and Simon Clematide},
      year={2026},
      eprint={2601.16934},
      archivePrefix={arXiv},
      primaryClass={cs.CL},
      url={https://arxiv.org/abs/2601.16934}, 
}