Datasets:
Data Sources and Composition
The dataset contains 18,935,335 directional translation examples across 21 source pools. Percentages below are calculated from the final example counts, not token counts or unique bilingual pairs.
| Source | Examples | Share |
|---|---|---|
| UNPC | 3,704,842 | 19.566% |
| OpenSubtitles | 2,708,074 | 14.302% |
| MultiUN | 2,377,741 | 12.557% |
| CCMatrix | 1,580,197 | 8.345% |
| OPUS100 | 1,554,605 | 8.210% |
| WikiMatrix | 1,415,377 | 7.475% |
CCAligned — additional OPUS pool (opus_big_ccaligned) |
1,080,624 | 5.707% |
CCAligned (ccaligned) |
955,073 | 5.044% |
| News Commentary | 951,488 | 5.025% |
CCMatrix — additional OPUS pool (opus_big_ccmatrix) |
764,627 | 4.038% |
| BWB | 486,810 | 2.571% |
| Wikimedia | 396,975 | 2.096% |
| TED2013 | 360,985 | 1.906% |
| WikiTitles | 293,505 | 1.550% |
| CoVoST2 | 232,457 | 1.228% |
| BSTC | 27,788 | 0.147% |
| TED2020 | 17,934 | 0.095% |
| QED | 13,955 | 0.074% |
| MASSIVE | 8,644 | 0.046% |
| Neulab TED Talks | 3,604 | 0.019% |
| ELRC Health | 30 | <0.001% |
| Total | 18,935,335 | 100% |
Translation Directions
| Direction | Examples | Share |
|---|---|---|
| English to Chinese | 10,106,394 | 53.373% |
| Chinese to English | 8,828,941 | 46.627% |
src identifies the source pool for each record. The additional OPUS pools are listed separately to match those labels. Percentages are rounded and may not sum to exactly 100%.