Describe the bug
The WebUI attempts to resolve a locale that does not exist. Eventually, WebUI rendering fails.

To Reproduce
This issue can be seen by accessing the WebUI from a non-English desktop.

Expected behavior
If the locale does not exist, it should be automatically resolved as en.

Screenshots

Desktop (please complete the following information):

• OS: Windows 10
• Browser: Chrome
• Version: 103

Additional context

Nothing