Unfortunately, app proxies do not have multi-language support. But we can translate it by the Visual Editor feature.
Or you can set up a URL redirection to solve the 404 error.
- Click "Nevigation"
- Click "URL Redirects"
- Click "Create URL redirect"
- Fill the "Redirect from" textbox with the original URL that you'd like to forward visitors from. Like image.
- Fill the "Redirect to" textbox with the new URL that visitors should be forwarded to. Like image.
- Click "Save" or "Save redirect", and done.