quangngoc BLEU is the abbreviation for bilingual evaluation understudy. BLEU is used for evaluating the quality of machine translated text. A text is considered higher quality the similar it is to a professional human translator. BLEU's is always between 0 and 1. The value of 1 is for the most similar text to the target text. A BLEU score of 0.5 is considered high quality, while a score of >0.6 is considered better than humans. Anything less than 0.2 is not understandable and does not give the gist of the translation well.
