Hi,
according to [1], Croatian language has no em-dash. Could lang-def.mkiv (lines 240-243) be fixed to be:
\c!leftsentence={\hbox{--~}},
\c!rightsentence={\hbox{~--}},
\c!leftsubsentence={--},
\c!rightsubsentence={--},
also, from my understanding, month names are only used for generating correct \date[...=...] output. If that's the case, they should be in Genitive case, as follows:
january = siječnja
february = veljače
march = ožujka
april = travnja
may = svibnja
june = lipnja
july = srpnja
august = kolovoza
september = rujna
october = listopada
november = studenog
december = prosinca
If it would be easier, I can send fixed lang-txt.lua.
Thanks,
Vedran Miletić
[1] http://hr.wikipedia.org/wiki/Crtica_%28pravopis%29