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And this is the code corresponding to the chapter

%Next command defines the opening and closing punctuation of citations
\setcitestyle{open={},close={}}

\renewcommand{\chaptermark}[1]{
\markboth{\chaptername
\ \thechapter.\ #1}{}
}

\renewcommand{\chaptermark}[1]{\markboth{\small \emph ...

I use a latex template to write my Thesis. This template was originally in english so I used the package babel to translate it to Spanish. However, the Chapter number, that appears writter wit letter, is still in english.

Any idea to change the chapter number to numbers?

Thanks in advance

Lander