swedish langugage not recognized under ubuntu
I tried to compile demo_lith_phd.tex in Ubuntu using TexLive, but I get an error saying
Package babel Error: Unknown language `swedish'. Either you have (babel) misspelled its name, it has not been installed, (babel) or you requested it in a previous run. Fix its name, (babel) install it or just rerun the file, respectively.
I have googled a lot and tried different solutions, but the problem remains. It is more surprising that other demo files compile without any problem.
Any suggestions on how I should get around this?