One or more computing devices, systems, and/or methods for selecting a primary language are provided. For example, a profile of a device may be generated comprising indications of a plurality of content items transmitted to the device and/or indications of a plurality of web pages associated with the plurality of content items. The profile may be analyzed to determine that a first language is associated with a plurality of items of the profile and the plurality of items comprises more than a threshold amount of items. The first language may be selected as a primary language of the device. A request for content may be received. A content item, associated with the first language, may be selected based upon the selection of the first language as the primary language. The content item may be transmitted to the device.