\documentclass[a4paper,12pt]{article}
\usepackage[T1]{fontenc}
\PassOptionsToPackage{defaults=hu-min}{magyar.ldf}
\usepackage[magyar]{babel}
\usepackage{listings,xcolor,caption}

\lstset{
    language=Delphi,
    basicstyle=\footnotesize\ttfamily,
    numbers=left,
    backgroundcolor=\color{lightgray},
    frame=tlbr,
    keywordstyle=\color{blue},
}

\renewcommand{\lstlistingname}{programkód}

\begin{document}
\lstinputlisting[caption=Egy Delphi kód,label=kod-delphi]{prog.pas}
\end{document}