Allow disabling of all translations

[Klaus-Tockloth]

Checklist

• I have searched the issue tracker for open issues that relate to the same problem, before opening a new one.
• This issue only relates to a single bug. I will open new issues for any other problems.

Describe the bug

I want to disable all translations, for example with this code:

	// menu items for 'File' menu entry
	fileQuit := fyne.NewMenuItem(lang.L("Quit"),
		func() {
			slog.Info("user action: activate 'File -> Quit'")
			if isApplicationClosable {
				application.Quit()
			}
		})
	fileMenu := fyne.NewMenu("File", fileQuit)

The code above with German location results in one translated menu entry ("Beenden instead of Quit"):

But on a Windows with German (or general non-english) location I only want the non-translated, english menu entry 'Quit':

How to reproduce

See above.

Screenshots

No response

Example code

See above.

Fyne version

2.5.2

Go compiler version

1.23.3

Operating system and version

Windows

Additional Information

Similar issues:

#5242
#5158

[andydotxyz]

Please don't use a bug report to ask a question or request a feature. I have tried to update this to be clearer.