Systems, methods and computer program products for performing multi-lingual, multi-cultural searches, comparisons, and purchases of products offered for sale at multiple web sites on the internet

Systems, methods, and computer program products for performing multi-lingual, multi-cultural searches, comparisons, and purchases of products offered for sale at one or more Web sites on a computer network are provided. An intermediary Web site is configured to receive product search requests from users accessing the intermediary Web site via various types of client devices and via various languages. The intermediary Web site searches for nodes of a stored data structure that satisfy a received search request and sends results of the search to the requesting user. Search results may include lists of one or more products offered for sale at one or more of the Web sites that satisfy the received user request. A data structure is maintained by an intermediary and includes a plurality of nodes arranged in hierarchical order, wherein each node represents a respective category or sub-category of products offered for sale at one or more Web sites on a computer network. Each node may include language-specific information and culture-specific information associated therewith. Search results sent to requesting users may also include one or more user-manipulatable slider widgets that are configured to change the search results displayed within a user device display dynamically in real time in response to user manipulation.