FaceFX supports 8 languages: American English, UK English, French, German, Italian, Spanish, Korean, and Japanese.
If text is not being used, you can get good results analyzing any language using the default US English selection. A slight improvement in quality can be achieved using the closest "approximate" language in the no-text case. For optimal results however, text must be used and the appropriate language must be selected when analyzing the audio.
When using Japanese text, Katakana and Hiragana must be used. Kanji are not supported.
To analyze an audio file with a particular language, simply select the language from the Language listbox in the Create Animation Wizard. If you are using the analyze command, you can specify the language with the -language flag.