Package babel Error: Unknown language `french' still exists after installing texlive-lang-french

Question

I use a latex template on sharelatex and it works fine. However, I encounter the following issue when building it on my laptop (Ubuntu + Texmarker),

! Package babel Error: Unknown language `french'. Either you have
(babel) misspelled its name, it has not been installed,

This issue probably is caused by the template containing some french words. So I add the package babel,

\usepackage[francais]{babel}
%\usepackage[frenchb]{babel}

Refer to Package babel Error: Unknown option francais' and Package babel Error: Unknown language 'french' (not 'francais'), I install the package texlive-lang-french with sudo apt-get install texlive-lang-french, but the problem still exists. How can I fix this problem?