Software by IM-Translate SARL:

IM-Translate features immediate translation of IM using its proprietary language translator specifically developed for the IM world. IM-Translate conjugate verbs and uses sentence analysis to render the most accurate translation possible, instantly. Even IM chat slang/jargon has been incorporated into the translator. IM-Translate is available in French, English and Spanish. Both users need to install IM-Translate.