I'm using biblatex-chicago, together with babel and csquotes, as I'm making a compilation with two different languages for the reference section.

It works fine with one exception: cbyeditor is not defined for spanish, for some reason. I can manually define it using

\DefineBibliographyStrings{spanish}{cbyeditor = {eds.,}}

But this way it won't distinguish between 1 editor (ed.) or 2 or more editors (eds.) How could I achieve this?

  • 1
    Welcome to TeX.SE! Can you please add an short compilable tex code building your bibliography? Please do not forget to add a used bib entry to your question!
    – Mensch
    Feb 10, 2019 at 19:37
  • 2
    I don't think biblatex-chicago has a Spanish localization. It probably works where it relies on biblatex. As for plural forms, there are the cases where they exist, when the roles are specified by functions (editor/editors), but not so in the "by" strings, which are roles expressed as actions. That particular string thus, is to be read as "Editado por", which would be the same for one or more editors.
    – gusbrs
    Feb 10, 2019 at 19:41

1 Answer 1


The following MWE shows an example use of cbyeditor. Note that cbyeditor will just come out as cbyeditor because biblatex-chicago does not have a Spanish localisation file (there is no cms-spanish.lbx).


\usepackage[notes, backend=biber]{biblatex-chicago}



Citation: "Aristotle, De Anima, cbyeditor Robert Drew Hicks (Cambridge: Cambridge University Press, 1907)" Bibliography: "Aristotle. De Anima. Editado por Robert Drew Hicks. Cambridge: Cambridge University Press, 1907."

cbyeditor is biblatex-chicago's equivalent of byeditor for citations. It usually takes the short form of the string, so for Spanish you probably want

  cbyeditor = {ed\adddotspace por},

to obtain

Aristotle, De Anima, ed. por Robert Drew Hicks (Cambridge: Cambridge University Press, 1907)

Note that since the string cleverly uses a passive construction ('editado por'/'edited by'/'herausgegeben von') it avoids the need for a different plural string (at least in all languages biblatex currently speaks).

If you really wanted 'ed.'/'eds.' here, you would have to rewrite the entire byeditor macro family to use the editor strings. I doubt that would be a pleasant experience.

  • Is \NewBibliographyString{cbyeditor} needed?
    – gusbrs
    Feb 10, 2019 at 22:42
  • @gusbrs In this case yes because biblatex-chicago defines all of its new strings in the .lbx files (I think it would be better to define them at one central point in the .bbx or .cbx where they are needed). Since there is no cms-spanish.lbx the string would not be defined otherwise.
    – moewe
    Feb 10, 2019 at 22:45
  • I see, good point. I assumed they were defined in a single place. But I actually forgot, as I went to and fro those .lbxs quite a lot in the past.
    – gusbrs
    Feb 10, 2019 at 22:48

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