Detect when base text is used for other languages

[taher-mosbah]

Thanks for this great tool, I have an improvement suggestion but not sure if it would be useful for everyone:
a common case is when developers is waiting for translation is to put the English (base) text for other languages and forget about it.
I can open a PR with this added if you think it could be useful.
Cheers !

[hborders]

I think populating localizations with english strings is bad practice. I'm not sure of the value of putting base text into other localizations. I also think that this will likely clash with cases where localizations use the same language as the base localization.