Achieving Human Parity on AutomaticChinese to English News Translation
Table 7: Error distribution, as fraction of sentences that contain specific error categories.
['[BOLD] Error Category', '[BOLD] Fraction [%]']
The four major error types are Missing words, Incorrect Words, Ungrammatical, and Named Entity. Each accounts for roughly 5% of errors. This indicates that there is still room to improve machine translation quality via various approaches, such as modeling Missing Words [tu2016modeling, AttentionFertility], integration of high quality data for named-entity translation, as well as domain and topic adaptation for the issues of incorrect words and ungrammaticality.