Translation memories (TM) are widely used in the localization industry to improve consistency and speed of human translation. Several approaches have been presented to integrate the bilingual translation units of TMs into statistical machine translation (SMT). We present an extension of these approaches to the integration of partial matches found in a large, monolingual corpus in the target language, using cross-language information retrieval (CLIR) techniques. We use locality-sensitive hashing (LSH) for efficient coarse-grained retrieval of match candidates, which are then filtered by finegrained fuzzy matching, and finally used to re-rank the n-best SMT output. We show consistent and significant improvements over a state-of-the-art SMT system, across different domains and language pairs on tens of millions of sentences.
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