9. A system comprising: one or more computer processors and storage, at a second publication system, configured to: receive, from a first publication system, a first plurality of user queries that are in a first language that are in a category and that exhibit a constraint, and a first plurality of result sets, respective ones of which correspond to respective ones of the first plurality of user queries and that exhibit a first group of implicit user behavior with respect to the first plurality of user result sets; detect, by a user behavior module of a machine translation application at the second publication system, implicit user behavior in the first group of implicit user behavior that indicates that at least some of the first plurality of user queries are satisfied by respective ones of the first plurality result sets; one or more computer processors and storage, at the first publication system, configured to: receive, from the second publication system, a second plurality of user queries in a second language that that are in the category and that exhibit the constraint, and a second plurality of result sets that exhibit a second group of implicit user behavior with respect to the second plurality of result sets; detect by a user behavior module of a machine translation application at the first publication system, implicit user behavior in the second group of implicit user behavior that indicates that at least some of the second plurality of user queries are satisfied by respective ones of the second plurality of result sets; execute a decision application configured to detect that the at least some of the first plurality of user queries and the at least some of the second plurality of user queries satisfy respective thresholds; and execute a learning and correlation module configured, responsive to the detection that the at least some of the first plurality of first user queries and the at least some of the second plurality of user queries satisfy respective thresholds, to provide an indication to at least one of the machine translation application in the second publication system or the machine translation application in the first publication system that at least one of the first plurality of user queries and at least one of the second plurality of user queries are likely to be translations of each other.
9. A system comprising: one or more computer processors and storage, at a second publication system, configured to: receive, from a first publication system, a first plurality of user queries that are in a first language that are in a category and that exhibit a constraint, and a first plurality of result sets, respective ones of which correspond to respective ones of the first plurality of user queries and that exhibit a first group of implicit user behavior with respect to the first plurality of user result sets; detect, by a user behavior module of a machine translation application at the second publication system, implicit user behavior in the first group of implicit user behavior that indicates that at least some of the first plurality of user queries are satisfied by respective ones of the first plurality result sets; one or more computer processors and storage, at the first publication system, configured to: receive, from the second publication system, a second plurality of user queries in a second language that that are in the category and that exhibit the constraint, and a second plurality of result sets that exhibit a second group of implicit user behavior with respect to the second plurality of result sets; detect by a user behavior module of a machine translation application at the first publication system, implicit user behavior in the second group of implicit user behavior that indicates that at least some of the second plurality of user queries are satisfied by respective ones of the second plurality of result sets; execute a decision application configured to detect that the at least some of the first plurality of user queries and the at least some of the second plurality of user queries satisfy respective thresholds; and execute a learning and correlation module configured, responsive to the detection that the at least some of the first plurality of first user queries and the at least some of the second plurality of user queries satisfy respective thresholds, to provide an indication to at least one of the machine translation application in the second publication system or the machine translation application in the first publication system that at least one of the first plurality of user queries and at least one of the second plurality of user queries are likely to be translations of each other. 12. The system of claim 9 wherein the respective thresholds comprise a first percentage of the plurality of the first user queries that are satisfied by result sets responsive to the plurality of first user queries and a second percentage of the second plurality of user queries that are satisfied by result sets responsive to the second plurality of user queries.