A sign language message may be derived from user movements detected proximate to an electronic device by comparing the movements to a database that includes data regarding one or more sign languages. A control function may then be identified which the electronic device may be caused to perform. Output related to the user's detected movements may be provided to the user. In some implementations, output specifying identified control functions may be transmitted to a presentation device. Further, in some implementations, if a sign language message and/or a control function cannot be unambiguously derived and/or identified, output promoting the user to provide additional information may be transmitted to a presentation device. Detected movements may be compared to data regarding multiple different sign languages and/or a subset of available multiple different sign languages.