24. The system of claim 22 , wherein the portion of content from a document is one or more of: a title of the document; anchor terms associated with the document; and an excerpt of the document, the excerpt containing terms from the respective stored search query.
22. The system of claim 18 , wherein the operations further comprise: identifying a search result access log identifying search queries and corresponding snippets, each record in the search result access log identifying a respective stored search query and a corresponding snippet, the snippet of a respective stored search query being a portion of content from a document accessed by a user, the document having been presented to the user as a search result in response to receiving the respective stored search query; and building a translation model trained on the search queries and the corresponding snippets including using the search queries from the search result access log as a source language for the translation model and the corresponding snippets as a target language for the translation model, wherein using statistical machine translation to translate the initial search query into a translated search query comprises providing the initial search query as input to the translation model trained on the search queries and the corresponding snippets and receiving the translated search query as output from the translation model trained on the search queries and the corresponding snippets.