The changes package and british babel: Undefined control sequence

Question

Using the changes package, whenever I use the babel package with the british option, I get an "Undefined control sequence" error that points to the line where I want to use the changes markup. However, I do not get any errors when british is replaced with english. Minimal working example below.

\documentclass{article}
\usepackage[british]{babel}
\usepackage{changes}
\begin{document}

Some old text. \added{Something new.}

\end{document}

Answer 1

The changes package supports a few babel languages, but not british.

You can solve the issue by adding the support yourself:

\documentclass{article}
\usepackage[british]{babel}
\usepackage{changes}

\addto\captionsbritish{\def\listofchangesname{List of changes}}
\addto\captionsbritish{\def\summaryofchangesname{Changes}}
\addto\captionsbritish{\def\changesaddname{Added}}
\addto\captionsbritish{\def\changesdeletename{Deleted}}
\addto\captionsbritish{\def\changesreplacename{Replaced}}
\addto\captionsbritish{\def\changesauthorname{Author}}
\addto\captionsbritish{\def\changesanonymousname{anonymous}}
\addto\captionsbritish{\def\changesnoloc{List of changes is available after the next \LaTeX\ run.}}
\addto\captionsbritish{\def\changesnosoc{Summary of changes is available after the next \LaTeX\ run.}}

\begin{document}

Some old text. \added{Something new.}

\end{document}

You can ask the package maintainer to add support, as it's really easy: I just copied the code for english, changing \captionsenglish to \captionsbritish.

Answer 2

The changes package provides british translations for a while now, so no workaround is needed anymore.