Am 22.08.2014 um 16:27 schrieb Javier Bezos: > \documentclass{article} > \usepackage[german]{babel} > \begin{document} > \makeatletter > \def\bbl@elt#1#2#3#4{// #1 - #2 - #3 - #4} > \message{\bbl@languages} > \makeatother > \end{document} Thanks! Here's what I've come up with to convert Babel language identifiers to numbers in Lua. Best regards, Stephan Hennig \documentclass{article} \usepackage[german]{babel} \begin{document} \makeatletter \begingroup \def\bbl@elt#1#2#3#4{/#1/#2/#3/#4/} \directlua{ % Global table translating language strings to numbers. language_num = {} local languages = '\luatexluaescapestring{\bbl@languages}' for language, num, pattern, ex in unicode.utf8.gmatch(languages, '/(.-)/(.-)/(.-)/(.-)/') do language_num[language] = tonumber(num) texio.write_nl(language .. ' = ' .. num) end } \endgroup \makeatother \directlua{ local function lang2num(l) local n = language_num[l] or 'unknown' texio.write_nl('[lang2num] ' .. l .. ' = ' .. n) end lang2num('english') lang2num('german') lang2num('finish') lang2num('finnish') } \end{document}