1. A method for identifying parallel sub-sentential fragments in a bilingual collection, the method comprising: translating a source document from a bilingual collection; querying a target library associated with the bilingual collection using the translated source document; identifying one or more target documents based on the query; aligning a source sentence associated with the source document to one or more target sentences associated with the one or more target documents; and determining whether a source fragment associated with the source sentence comprises a parallel translation of a target fragment associated with the one or more target sentences.