documentclass[11pt]{article}
usepackage[utf8x]{inputenc}
usepackage[LGR,T1]{fontenc}
usepackage[polutonikogreek,catalan,english]{babel}

begin{document}

fsdgsdforeignlanguage{polutonikogreek}{ανδροσ}foreignlanguage{catalan}{asdfasf}

end{document}