All table cells need to have two lines

Question

I found this answer with search: https://tex.stackexchange.com/a/19678/53832

Is there some way to make all cells in the table to work like this? Some of the cells in the table are multirow cells if that makes any difference.

MWE

\documentclass{article}
\usepackage[landscape]{geometry}
\usepackage{multirow}
\begin{document}
\begin{table}[ht]
\begin{tabular}{c|c|c|c}
\hline
\multirow{8}{*}{\begin{tabular}[x]{@{}c@{}}This is first line\\This is second line\end{tabular}} & \multirow{4}{*}{\begin{tabular}[x]{@{}c@{}}This is first line\\This is second line\end{tabular}} & \multirow{2}{*}{\begin{tabular}[x]{@{}c@{}}This is first line\\This is second line\end{tabular}} & \begin{tabular}[x]{@{}c@{}}This is first line\\This is second line\end{tabular} \\ [30pt] \cline{4-4}

& & & This cell should have also two lines \\ [30pt] \cline{3-4}

& & \multirow{2}{*}{This cell should have also two lines} & This cell should have also two lines \\ [30pt] \cline{4-4}

& & & \begin{tabular}[x]{@{}c@{}}This is first line\\This is second line\end{tabular} \\ [30pt] \cline{2-4}

& This cell should have also two lines & \multirow{2}{*}{\begin{tabular}[x]{@{}c@{}}This is first line\\This is second line\end{tabular}} & This cell should have also two lines \\ [30pt] \cline{4-4}

& & & This cell should have also two lines \\ [30pt]
\hline
\end{tabular}
\end{table}
\end{document}