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UNPC

United Nations Parallel Corpus

Source: https://cms.unov.org/UNCorpus

6 languages, 15 bitexts
total number of files: 799,276
total number of tokens: 3.96G
total number of sentence fragments: 172.04M

For references, please cite this reference: Ziemski, M., Junczys-Dowmunt, M., and Pouliquen, B., (2016), The United Nations Parallel Corpus, Language Resources and Evaluation (LREC’16), Portorož, Slovenia, May 2016.

Download

Below you can download data files for all language pairs in different formats and with different kind of annotation (if available). You can click on the various links as explained below. In addition to the files shown on this webpage, OPUS also provides pre-compiled word alignments and phrase tables, bilingual dictionaries, frequency counts, and these files can be found through the resources search form on the top-level website of OPUS.

The following disclaimer, an integral part of the United Nations Parallel Corpus, shall be respected with regard to the Corpus (no other restrictions apply):

Bottom-left triangle: download files
  • ces = sentence alignments in XCES format
  • leftmost column language IDs = tokenized corpus files in XML
  • TMX and plain text files (Moses): see "Statistics" below
  • lower row language IDs = parsed corpus files (if they exist)
Upper-right triangle: sample files
  • view = bilingual XML file samples
  • upper row language IDs = monolingual XML file samples
  • rightmost column language IDs = untokenized corpus files

ar en es fr ru zh
ar viewviewviewviewviewar
en ces viewviewviewviewen
es ces ces viewviewviewes
fr ces ces ces viewviewfr
ru ces ces ces ces viewru
zh ces ces ces ces ces zh
ar en es fr ru zh

Statistics and TMX/Moses Downloads

Number of files, tokens, and sentences per language (including non-parallel ones if they exist)
Number of sentence alignment units per language pair

Upper-right triangle: download translation memory files (TMX)
Bottom-left triangle: download plain text files (MOSES/GIZA++)
Language ID's, first row: monolingual plain text files (tokenized)
Language ID's, first column: monolingual plain text files (untokenized)

language files tokens sentencesar en es fr ru zh
ar 116,751 570.5M 23.7M16.6M 17.1M 17.0M 17.2M 14.7M
en 159,336 779.7M 34.5M20.0M 20.0M 22.9M 19.8M 14.2M
es 130,275 779.8M 29.1M20.5M 25.2M 20.5M 18.0M 14.5M
fr 158,800 949.3M 35.3M20.3M 30.3M 25.9M 20.1M 14.5M
ru 138,168 702.9M 29.2M20.6M 25.2M 22.3M 25.2M 14.8M
zh 95,946 180.4M 20.1M17.3M 17.5M 17.6M 17.5M 17.9M

Note that TMX files only contain unique translation units and, therefore, the number of aligned units is smaller than for the distributions in Moses and XML format. Moses downloads include all non-empty alignment units including duplicates. Token counts for each language also include duplicate sentences and documents.