How can I renew the \textcite command and change the delimiter for two authors of the same cite key?

Question

I am using the author-year style luh-ipw and need to use \slash as delimiter for two or more authors in the bibliography. I changed it via adding following code in the preamble:

\renewcommand*{\multinamedelim}{\slash}
\renewcommand*{\finalnamedelim}{\slash}

unfortunately this also affects the \textcite command. But instead I need the preconfigured "and" delimiter back. The biblatex option

maxcitenames=1

is not the solution.

After some research and consultancy of the biblatex-manual I tried to add

\renewcommand*{\textcitedelim}{\finalandcomma}

which I thought adds an "and"-delimiter instead of the slash. Unfortunately it doesn't do anything at all. I only want to change the \textcite command but not the \cite or \parencite commands. So the question is: How can I renew the \textcite command and change the delimiter for two authors of the same cite key?

My MWE:

\documentclass{scrreprt}

\usepackage{filecontents}
    \begin{filecontents}{bibliographie.bib}
@article{Kuyucu.2010a,
Author = {Kuyucu, Tuna and {\"U}nsal, {\"O}zlem},
Journal = {Urban Studies},
Month = {06},
Number = {7},
Pages = {1479--1499},
Title = {\enquote{Urban Transformation} as State-Led Property Transfer: An Analysis of Two Cases of Urban Renewal in Istanbul},
Volume = {47},
Year = {2010}
}

\end{filecontents}

\usepackage[german=quotes, strict=true]{csquotes} %Because of \enquote

\usepackage[
backend=biber,
style=authoryear-luh-ipw
]
{biblatex}

\renewcommand*{\multinamedelim}{\slash}%
\renewcommand*{\finalnamedelim}{\slash}%
\renewcommand*{\labelnamepunct}{\addcolon\space}

\bibliography{bibliographie}

\begin{document}

\textcite{Kuyucu.2010a}

\printbibliography

\end{document}

It looks like

Kuyucu/Ünsal (2010) but should more look like Kuyucu und Ünsal (2010)

Answer 1

Here's a suggestion using the package xpatch to set the default definition of \multinamedelim and \finalnamedelim only for the bib-macro textcite

\documentclass[11pt]{article}
\usepackage{xpatch}
\usepackage[style=authoryear]{biblatex}



\addbibresource{biblatex-examples.bib}

\let\multinamedelimorig\multinamedelim
\let\finalnamedelimorig\finalnamedelim
\xpretobibmacro{textcite}{%
  \let\multinamedelim\multinamedelimorig%
  \let\finalnamedelim\finalnamedelimorig%
 }{}{}

\renewcommand*{\multinamedelim}{\slash}
\renewcommand*{\finalnamedelim}{\slash}

\usepackage{hyperref}
\begin{document}
\cite{companion}\qquad\cite{knuth:ct:a}

\textcite{companion}\qquad\textcite{knuth:ct:a}

\parencite{companion}\qquad\parencite{knuth:ct:a}


\textcite{companion}\qquad\textcite{knuth:ct:a}


\printbibliography

\end{document}