11. A machine-readable storage device comprising a computer program product, the computer program product including instructions which, when executed by data processing apparatus, cause the data processing apparatus to perform operations comprising: receiving a search query in a first language; receiving a plurality of search results responsive to the search query, wherein the search results comprise one or more first search results and a plurality of second search results, wherein each first result identifies a respective document in the first language and a corresponding respective document in a different second language, and wherein the second search results each identify a respective document in the first language; ordering the search results based on, at least, a respective number of documents identified by each of the search results; and providing the ordered search results in response to the search query.
20. The storage device of claim 11 wherein receiving the search results comprises searching one or more first language document indexes.