[Tex/LaTex] How to escape plain text in section titles

Question

How one may with section titled "zażółć gęślą jaźń" or "\newline is a new line in LaTeX" may easily escape them? It is ceratin that nothing there should be treated as LaTeX formatting.

There is a nice solution for normal text, described in How can I escape plain text?

Unfortunately it fails for \section{}:

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}

\usepackage{fvextra}
\DefineVerbatimEnvironment{escape}
  {Verbatim}
  {fontfamily=\rmdefault,breaklines,breaksymbolleft={}}

\begin{document}

\tableofcontents
\newpage
\section{\begin{escape}\newline\end{escape}}
\begin{escape}
red fox
sauté
zażółć gęślą jaźń
\newline is a new line in LaTeX
Samp_Dist_Corr
whatever whatever whatever whatever whatever whatever whatever whatever whatever whatever whatever
\end{escape}

\end{document}

fails with

! Argument of \FV@BeginScanning has an extra }.
<inserted text> 
                \par 
l.14 \section{\begin{escape}\newline\end{escape}}

Using \section{\escape{\newline}} is not changing neither outcome nor error message.

To avoid XY problem: I am using pdflatex to generate pdf files from plaintext.

Answer 1

Define also an inline version of escape and use cprotect.

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{cprotect}
\usepackage{fvextra}
\DefineVerbatimEnvironment{escape}
  {Verbatim}
  {fontfamily=\rmdefault,breaklines,breaksymbolleft={}}
\CustomVerbatimCommand\escapeinline{Verb}{fontfamily=\rmdefault,breaklines,breaksymbolleft={}}

\begin{document}

\tableofcontents

\cprotect\section{\escapeinline|\newline|}

This is inline: \escapeinline|??{xx|

\begin{escape}
red fox
sauté
zażółć gęślą jaźń
\newline is a new line in LaTeX
Samp_Dist_Corr
whatever whatever whatever whatever whatever whatever whatever whatever whatever whatever whatever
\end{escape}

\end{document}