To allow machine operators to switch languages during runtime on an actual HMI panel, designers must explicitly enable and configure these languages within the project. 17 - WinCC Flexible - Multi Language Capability
Choose the specific language you want the HMI screen to display immediately when the panel boots up. Translating HMI Text Elements
If a field is empty, the language may appear as default.
Open any HMI screen where you want the language toggle to live.
Install the required language pack through Windows settings. After restarting your computer, the language should become available in WinCC Flexible.