Neural machine Translation
Statistical Machine Translation
System combination has been a very successful method for statistical machine translation, so the idea has been also picked up to improve word alignments.
Word Alignment Combination is the main subject of 16 publications. 7 are discussed here.
Topics in WordAlignmentWord Alignment Based On Coocurrence | Word Alignment With Linguistic Annotation | Word Alignment For Syntax Based Models | Discriminative Word Alignment | Word Alignment Combination | Word Alignment Evaluation | Alignment Of Subsentential Units
Topics in WordBasedModelsIBM Models | Symmetrization | Word Alignment | Dictionaries From Comparable Corpora | Lexical Choice | MT Without Word Alignment
System combination of output from different machine translation systems is a more complex problem, but has been shown to be very successful.