change reference appearance of apacite (but only for german language)

Question

I have a xyz.bib file like that:
@article{name,
title = {This Is An English Title}
}
@article{name2,
title = {This Is Test German Title}
}

According to the "APA-Rules" the produced entries have only capital letters at the beginning of the title.
But for german titles this rule may not apply (don't ask me why).
I want the title to be taken as it is in the bib file. (upper and lower case )
How can I change that using the apacite package like that:
documentclass{article}
usepackage{apacite}

begin{document}

Random citation cite{name} embeddeed in text.
Random citation cite{nam2} embeddeed in text.
 
bibliography{xyz}
bibliographystyle{apacite}

end{document}

I thought about an lang= xyz-tag in the bib-file, but couldn't get it to work.
EDIT:
BibTeX loses capitals when creating .bbl file
I have found a solution. I have probably thought much too complicated.

moewe · Accepted Answer

apacite can be configured to retain the original capitalisation (with APACrefatitle), but it does not support per-entry switching.
documentclass{article}
usepackage{apacite}

renewcommand{APACrefatitle}[2]{#1}

begin{filecontents}{jobname.bib}
@article{name,
  title  = {This Is an {English} Title},
  langid = {english},
}
@article{name2,
  title  = {Ein deutscher Testtitel},
  langid = {ngerman},
}
end{filecontents}

begin{document}
Random citation cite{name} embeddeed in text.
Random citation cite{name2} embeddeed in text.
 
bibliography{jobname}
bibliographystyle{apacite}
end{document}

So if you need per-entry capitalisation protection for apacite, your best bet is probably the otherwise definitely not recommended practice of protecting the entire title with a pair of curly braces. See more at BibTeX loses capitals when creating .bbl file.

biblatex would support a per-entry switch out of the box with the langid field (and there is an APA style for biblatex: biblatex-apa for 7th edition APA style and biblatex-apa6 for 6th edition APA style).
documentclass[american]{article}
usepackage[T1]{fontenc}
usepackage{babel}
usepackage{csquotes}

usepackage[backend=biber, style=apa]{biblatex}

begin{filecontents}{jobname.bib}
@article{name,
  title  = {This Is an {English} Title},
  langid = {english},
}
@article{name2,
  title  = {Ein deutscher Testtitel},
  langid = {ngerman},
}
end{filecontents}
addbibresource{jobname.bib}
addbibresource{biblatex-examples.bib}

begin{document}
Lorem autocite{sigfridsson,name,name2}

printbibliography
end{document}

change reference appearance of apacite (but only for german language)

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