If this is the fix for those that are not faint of heart, then here is a workaround for those that are.
Using Chrome or similar browser with web developer console,
1. Go to the camera logon page.
2. Open the developer console. (In Chrome, hit F12 or Ctrl+Shift+J)
3. Type: chooseLanguage("en") and then hit enter. The language should automatically change to English.
4. Continue with the logon.
This is not as permanent as the solution discussed in this thread, but it works well without changing anything in the camera. The JavaScript function, chooseLanguage, is what would have been called, if you had the choice of selecting English in the combo box on the logon page.