\documentclass{article}

\usepackage[utf-8]{inputenc}
\usepackage[T2A,T1]{fontenc}

\begin{document}

Czech (česky)           Dobrý den

French (Français)       Bonjour, Salut

German (Deutsch Süd)    Grüß Gott

Polish                  Dzień dobry, Hej

\fontencoding{T2A}\selectfont

Russian (Русский)       Здравствуйте!

\fontencoding{T1}\selectfont

Slovak                  Dobrý deň

Spanish (Español)       ¡Hola!

Turkish (Türkçe)        Merhaba

\end{document}