Improving Transformer-Based Neural Machine Translation with Prior Alignments

Table 9

Translations of a Vietnamese sentence comprising 20 tokens.

	Testcase 3
Vietnamese source	“buổi đêm ở đây khá nhàm chán vì chúng tôi không biết phải làm gì trước khi đi ngủ.”
English reference	“night can be quite boring because we didn’t know what to do before sleeping.”
Translation by transformer	“it was pretty tired because we didn’t know what to sleep before bed.”
Translation by transformer-M	“tonight is quite tired because we don’t know what to sleep before going to sleep.”
Translation by transformer-S3	“this night is quite boring because we don’t know what to do before going to bed.”