If you want a speech-to-speech translator that can span multiple languages in a conversation without any setup or configuration, the 3PO project is worth a look. This tool translates in real time from 45 languages, so it could be useful for international conferences, hotels, language classes and any other situation where multiple languages are used every day. It also protects privacy since it doesn't store or use your audio data for anything else.
Another contender is Byrdhouse, which offers real-time voice and caption translation for more than 100 languages. It also offers voice-to-text transcription, accent and dialect support, and auto-language detection. Byrdhouse is geared for breaking down language barriers in meetings, calls and chats, so it's good for remote workers and global companies.
For global teams and companies, Dialects offers real-time voice and text translation for more than 100 languages. It's got live voice sync, instant text-to-speech translation and a clean interface for managing projects. It's geared for small to midsize teams trying to save money on language training and get more out of their communication.