Polyglot 3000 is automatic language identifier that can detect the language used in a text, phrase, or even a single word. The program features over 400 languages. Input text files utilise both Unicode and ANSI encodings. Polyglot 3000 features: Recognize more than 400 languages. Supports Unicode texts. Nice user interface. True-Coloured icons in menu and toolbar. Quick and correct language identification. Recognize language just among popular languages. Multilingual interface (English, German, French, Spanish).
Source: http://www.polyglot3000.com/