Thuban is implemented with internationalization support. So far Thuban is translated by volunteers to the following languages (apart from its main language: English):
French
German
Italian
Portuguese (Brazilian)
Russian
Spanish
To use internationalization under POSIX systems (like GNU/Linux) you have to set the environment variable LC_ALL accordingly (e.g. LC_ALL=fr_FR for the french language support). Please check your systems documentation for details and supported settings. Specifiying LC_ALL on the command line while launching thuban allows appication specific language settings:
LC_ALL=fr_FR thuban.py
MS Windows users have to specify the language to be used via the control bar (which effects all applications).