8. At least one computer storage device storing computer-executable instructions that, when executed by a computing device, cause the computing device to perform actions for generating a query translation pair, the actions comprising: establishing a plurality of seed query pairs that each comprise a source language query and a target language query that have the same meaning but are in different languages, where the source language query is different for each of the plurality of seed query pairs; finding a plurality of URL pairs from click-through data, the plurality of URL pairs based on the seed query pair; extracting URL pair patterns from ones of the plurality of URL pairs having a similarity score above a particular threshold; extracting from the click-through data bilingual URL pairs identified by the URL pair patterns; identifying in the click-through data candidate query pairs corresponding to the bilingual URL pairs; and filtering the candidate query pairs based on a confidence score resulting in a query translation pair where queries of the query translation pair are translations of each other.
8. At least one computer storage device storing computer-executable instructions that, when executed by a computing device, cause the computing device to perform actions for generating a query translation pair, the actions comprising: establishing a plurality of seed query pairs that each comprise a source language query and a target language query that have the same meaning but are in different languages, where the source language query is different for each of the plurality of seed query pairs; finding a plurality of URL pairs from click-through data, the plurality of URL pairs based on the seed query pair; extracting URL pair patterns from ones of the plurality of URL pairs having a similarity score above a particular threshold; extracting from the click-through data bilingual URL pairs identified by the URL pair patterns; identifying in the click-through data candidate query pairs corresponding to the bilingual URL pairs; and filtering the candidate query pairs based on a confidence score resulting in a query translation pair where queries of the query translation pair are translations of each other. 10. The at least one computer storage device of claim 8 where the seed query pair is taken least in part from a bilingual dictionary.