You can update from within Candy, via the Update Candy option in the Support menu or by downloading the latest version available here:
How to change the Candy’s Language
1. Go to the menu “Configure system settings”;
2. Select item “8 – Languages”;
3. Browse for and select to install the lingo file. Lingo files have a .GNL extension. For example, “PORT.GNL”;
4. Select from the installed lingo files;
5. Select the language of the Excel that is installed on the operating system.