30. A system for facilitating cross-language communication among users of respective wireless communication devices, the system comprising: first and second wireless communication devices, each wireless communication device including a respective: first user interface configured to receive a respective user input indicating willingness to participate in a cross-language communication session with the other wireless communication device; second user interface configured to receive a respective user message, after receipt of the user inputs indicating willingness to participate in the cross-language communication session; third user interface configured to output a respective translated user message; and sensor, other than an antenna, configured to receive an ambient signal; a coordination module configured to automatically: compare the first signal to the second signal to determine whether the first signal and the second signal satisfy a similarity criterion; and if the first and second signals satisfy the similarity criterion, establish the cross-language communication session; a first automatic translation module configured, if the cross-language communication session is established, to generate the translated user message by translating the user message received by the first wireless communication device from a first natural language to a second natural language; and a first transmitter module configured, if the cross-language communication session is established, to wirelessly send, from the first wireless communication device to the second wireless communication device, at least one of the user message received by the first wireless communication device and the translated user message.
33. A system according to claim 30 , wherein the coordination module is configured automatically compare the first signal to the second signal to determine whether the first signal and the second signal satisfy a similarity criterion and automatically establish the cross-language communication session, such that each user's privacy is preserved.