language aliases
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jschrod
xindy could provide aliases for some babel language names, e.g. ngerman -> german.
[LyX supports the replacement of $$lang with the document language (babel name) within the global index calling command (e.g. "texindy -L $$lang"). With document language German (new spelling), this fails because xindy is not aware of ngerman.]
I am withdrawing this. Proper language -> xindy mapping will be implemented in LyX itself instead.