does not work with Swiss variants

[robinschwab]

The package is incompatible with variants of Swiss German. This breaks siunitx

\documentclass{article}
\usepackage[english,nswissgerman,german]{babel}
\usepackage{translations}
\DeclareTranslation{English}{to (numerical range)}{to}
\DeclareTranslation{German}{to (numerical range)}{bis}
%\DeclareLanguageAlias{nswissgerman}{swissgerman}  %this is the work around
\begin{document}
\selectlanguage{english}
English: \GetTranslation{to (numerical range)}

\selectlanguage{nswissgerman}
Schweizer Hochdeutsch: \GetTranslation{to (numerical range)}

\selectlanguage{german}
deutsches Deutsch: \GetTranslation{to (numerical range)}
\end{document}

Making it work with babel and nswissgerman is pretty easy however there are other variants in babel such as de-CH-1901 and there is polyglossia so a full fix needs more understanding than I have and probably also more testing.

[raigoe]

It breaks changelog too.

You've implemented swissgerman and you've aliased ngerman to german as well as naustrian to austrian. Why not do the same for nswissgerman?