Resolution:
The following languages are available for the Nimbus Author Client (including the help):
English (US)
French
German
Japanese
Note: When installing the Nimbus Author Client, the language of the server will dictate which language version of the Author Client is installed. If the language of the server is not supported then the English (US) version will be installed.
The following languages packs are included for the Web Server:
English (US)
English (UK)
German
French
Japanese
Simplified Chinese
Spanish
Brazilian Portuguese
Dutch
Swedish
Turkish
Please check the latest release notes if you are unsure; they can be located on TIBCO's Product Document website