Machine Translation (MT) of Multiword Expressions
According to Sag et al. (2002) Multiword Expressions are, apart from Disambiguation, one of the two key problems for Natural Language Processing (NLP) and especially for machine translation (MT).
The number of MWEs in a speaker's lexicon is estimated to be of the same order of magnitude as the number of single words. Specialized domain vocabulary overwhelmingly consists of MWEs, hence, the proportion of MWEs will rise as a system adds vocabulary for new domains, because each domain adds more MWEs than simplex words.
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