Evaluation of Machine Translation Performance Across Multiple Genres and Languages

In this paper, we present evaluation corpora covering four genres for four language pairs that we harvested from the web in an automated fashion. We use these multi-genre benchmarks to evaluate the impact of genre differences on machine translation (MT). We observe that BLEU score differences between genres can be large and that, for all genres and all language pairs, translation quality improves when using four genre-optimized systems rather than a single genre-agnostic system. Finally, we train and use genre classifiers to route test documents to the most appropriate genre systems. The results of these experiments show that our multi-genre benchmarks can serve to advance research on text genre adaptation for MT.