I'm trying to change language in the classic thesis template from american to italian, but it does not work. In particular in the file "ClassicThesis" there is the command (https://ctan.org/tex-archive/macros/latex/contrib/classicthesis?lang=en ):


if I use:




the compiler shows an error. I changed also the command:


in the file "classicthesis-config".

I'm using Texmaker to open latex files.

EDIT: the error is:

! Package babel Error: Unknown language `ngerman'. Either you have

Thank you in advance for your time.

  • 2
    So what's the error? – PhilipPirrip Aug 14 '18 at 16:24
  • Hello @PhilipPirris, it is difficult to post the errors because they are long and thus are difficult to read. Do you think that I have to post it? – Gennaro Arguzzi Aug 14 '18 at 16:27
  • Yes, and they are not long, but very nicely formatted in a log file of the run. Alternatively you could make a minimal compilable example showing the issue. – TeXnician Aug 14 '18 at 16:41
  • Post at least a few lines before and after the relevant error message. Post it as code. The original package is for American and German. What happens when you replace all mentions of German with Italian. Make sure you have all necessary Italian language packages installed, i.e. that other Italian docs work for you. – PhilipPirrip Aug 14 '18 at 16:46
  • 1
    You need to pass to babel all language options you'll be using. I suppose you still have \selectlanguage{ngerman} somewhere in the files (probably Abstract.tex) but are not listing ngerman in \PassOptionsToPackage{ngerman,italian,american}{babel} – PhilipPirrip Aug 14 '18 at 17:03

If one's working with the original template, all language options that will be used in thesis files by \selectlanguage{italian} & co. should be added to \PassOptionsToPackage{italian,ngerman,american}{babel} in classicthesis-config.tex. The last language listed (here: american) is the main language of the thesis.

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