Add extra language 'No text' or 'Pictogram'
I have quite a lot of manuals in my Calibre Library (LEGO, K'Nex), and many have only pictograms, no language.
So I tried the language 'undefined' ('Onbepaald' in Dutch), but instead of this language no language at all is added.
Is it possible to add the language 'No text' or 'Pictogram' or something like that?
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