16. The system of claim 11 , wherein the one or more computers comprise a server operable to interact with a user interface device through a data communication network, and the user interface device is operable to interact with the server as a client.
11. A system comprising: a storage device having instructions stored thereon; and one or more computers operable to execute the instructions to perform operations comprising: identifying click data for a document, wherein the click data represents a plurality of selections of the document, each selection being weighted according to a respective viewing time of the document when the document was identified as a search result responsive to a query submitted by a respective user in a respective country in a respective language; calculating first click data by aggregating the weighted selections of the document that are for a same respective country; calculating second click data by aggregating the weighted selections of the document that are for a same respective language; deemphasizing the second click data relative to the first click data based on, at least, a determination that a language of the query and a language of a user interface are the same; and calculating a quality of result statistic for the document by combining the first click data with the deemphasized second click data; and providing the quality of result statistic as an input to a ranking for the document.