The List of languages that you can view or use your CRM in are as listed below
- US English
- DE Deutsch
- ES Spanish
- British English
- IT Italian
- ES Mexico
- PT Brasil
- Turkce Dil Paketi
- Romana
- Francais
- NL-Dutch
- HU Magyar
- Russian
- Polish
- Swedish
- Arabic
- Chinese, Simplified
- Traditional Chinese
- Slovak
- Vietnamese
- Hebrew
- Croatian
- Bulgarian
- Portuguese
- Japanese
For more info how to change the preferred language in your Vtiger account refer this
helpdoc.