Corrupted language cache or incomplete installation.
Unlike some office suites that require a full reinstall, WPS Office handles languages via modular packs. Here is the step-by-step: Wps Office Italian Language Pack
The process to switch to Italian is standardized across the Windows and Linux desktop versions: Corrupted language cache or incomplete installation
This will change all menus, buttons, and settings to Italian. Open WPS Office : Launch the application on your computer. Global Settings : Click the Global Settings Wps Office Italian Language Pack