[KevinH]

If Users think language codes are too technical, then how on earth would they have any idea about adding lang or xml:lang attributes?

Ditto for dc:language?

At some point, you have to assume some technical knowledge by the user, don't you?

As for alignment, as the image shows, it is sorted by lang code first then word as although the sequence of chars may be identical, they are truly different words if in different languages. So no whitespace alignment needed.

And I really also have no interest is copying gui elements from Calibre. I am trying to find something simpler and unique, not just duplicate what anyone else has done.