Error code:   ConfigNamesError
Exception:    TypeError
Message:      'list' object is not a mapping
Traceback:    Traceback (most recent call last):
                File "/src/services/worker/src/worker/job_runners/dataset/config_names.py", line 67, in compute_config_names_response
                  config_names = get_dataset_config_names(
                      path=dataset,
                      token=hf_token,
                  )
                File "/usr/local/lib/python3.14/site-packages/datasets/inspect.py", line 161, in get_dataset_config_names
                  dataset_module = dataset_module_factory(
                      path,
                  ...<4 lines>...
                      **download_kwargs,
                  )
                File "/usr/local/lib/python3.14/site-packages/datasets/load.py", line 1217, in dataset_module_factory
                  raise e1 from None
                File "/usr/local/lib/python3.14/site-packages/datasets/load.py", line 1192, in dataset_module_factory
                  ).get_module()
                    ~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/load.py", line 622, in get_module
                  dataset_infos = DatasetInfosDict.from_dataset_card_data(dataset_card_data)
                File "/usr/local/lib/python3.14/site-packages/datasets/info.py", line 396, in from_dataset_card_data
                  dataset_info = DatasetInfo._from_yaml_dict(dataset_card_data["dataset_info"])
                File "/usr/local/lib/python3.14/site-packages/datasets/info.py", line 317, in _from_yaml_dict
                  yaml_data["features"] = Features._from_yaml_list(yaml_data["features"])
                                          ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/features/features.py", line 2148, in _from_yaml_list
                  return cls.from_dict(from_yaml_inner(yaml_data))
                                       ~~~~~~~~~~~~~~~^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/features/features.py", line 2144, in from_yaml_inner
                  return {name: from_yaml_inner(_feature) for name, _feature in zip(names, obj)}
                                ~~~~~~~~~~~~~~~^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/features/features.py", line 2141, in from_yaml_inner
                  return {"_type": snakecase_to_camelcase(_type), **unsimplify(obj)[_type]}
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
              TypeError: 'list' object is not a mapping

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Welsh-English Legislation Translation Pairs

Parallel Welsh (cy) and English (en) text pairs extracted from paired legislation.gov.uk XML documents. Each row aligns leaf-level text from English and Welsh versions of the same statutory instrument.

v2 (2026-08-08): orthography-preserving re-extraction. Text now retains apostrophes (sy'n, Safonau'r), Welsh diacritics (â ê î ô û ŵ ŷ), digits and punctuation. The previous version stripped these to "letters and spaces only" (Safonau'r→Safonaur), which is corrected here. Pair count grew 6,296 → 9,627 (+53%), partly by recovering pairs whose Welsh file used a cy_…_en.xml name.

Source

Text pairs are re-extracted by extract_clean_pairs.py from the raw paired /data.xml and /welsh/data.xml documents (downloaded via download_page_xml.py). English and Welsh leaf text nodes are aligned by their structural XML path; pairs where the two sides are identical (English-fallback /cy/ pages), empty, URL-bearing, or pure boilerplate are dropped.

Fields

Field	Description
`translation.cy`	Welsh source text
`translation.en`	English target text
`group_id`	Content group folder ID from the source download

Usage

Load with the Hugging Face datasets library:

from datasets import load_dataset

dataset = load_dataset("json", data_files="data/train.jsonl", split="train")
print(dataset[0])

Upload to Hugging Face Hub

huggingface-cli login
huggingface-cli upload <your-username>/welsh-english-legislation ./hf_dataset

Generated 2026-06-26; re-extracted with orthography preserved 2026-08-08.

Downloads last month: 24

Total file size:

1.81 MB