Language Dynamics is the developer of the multilingual translation aid software WinDi (WINdows DIctionary). This linguistic project is a real alternative or complement to existing automatic translation services. WinDi avoids mistranslations and nonsense which often appear with other language technologies, thanks to its grammatical and human-driven approach, while allowing to translate in batch mode several millions of sentences per day. We are able to fully cover the communication needs of a specific domain in 7 languages and host the resulting translation database for a widespread or restricted access, including customized handheld devices.