# [Tex/LaTex] Package babel Error: Unknown option francais’

babelerrors

I recently updated my operating system from Ubuntu 13.04 to Ubuntu 13.10.

Since then, I am facing difficulties compiling my TeX code in which the french babel package is called. Please note that all my sources were compiling very fine before the system upgrade.

However, now, given the following header:

  \usepackage[francais]{babel}


! Package babel Error: Unknown option francais'. Either you misspelled it


What should I do? Please note that if I remove this part of code (\usepackage[francais]{babel}), everything is compiling well. I also tried it with french, and I receive the same result.

MINIMUM WORKING EXAMPLE :

\documentclass[11pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage[francais]{babel}
\usepackage[T1]{fontenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}

\begin{document}
This is a MINIMUM WORKING EXAMPLE.
\end{document}

! Package babel Error: Unknow option francais'. Either you misspelled it


The complete error message is:

! Package babel Error: Unknown option francais'. Either you misspelled it

Package file babel.sty supports francais since a very long time, thus the second line of the error message applies very likely:
The organization of the babel language files has recently changed. The language files (.ldf, ...) go into separate TeX distribution packages. For example, option francais loads frenchb.ldf:
• TeX Live puts the latter in the distribution package babel-french. It needs to be installed, if you are using tlmgr, the package manager of TeX Live.
• In Ubuntu saucy there is a package texlive-lang-french that contains frenchb.ldf (file list). Install it, if you are using TeX Live of Ubuntu.