subfloat reference label language?

Question

I want to get russian subreferences in subfloats:

I think it should be provided by

\usepackage{polyglossia} % support for languages
\setdefaultlanguage{russian}

but it doesn't work. Here's a full minimal working example:

\documentclass{book}

\usepackage{fontspec} % enagles loading of OpenType fonts
\usepackage{polyglossia} % support for languages

% fonts:
\defaultfontfeatures{Scale=MatchLowercase,Mapping=tex-text} % without this XeLaTeX won't turn "--" into dashes
\setmainfont{Arial}
\setsansfont{Arial}
\setromanfont{Arial}
\setmonofont{DejaVu Sans Mono}

% Russian/English document:
\usepackage{xecyr}
\newfontfamily\cyrillicfont{Arial}

\setmainlanguage{russian}
\setdefaultlanguage{russian}
\setotherlanguage{english}

\usepackage[lofdepth]{subfig}

\usepackage[russian]{hyperref}

\usepackage{todonotes}

\begin{document}


\begin{figure}[h]
  \centering
  \subfloat[][]{\missingfigure[figwidth=6cm]{Dummy figure}\label{subfig:1}
  }
  \subfloat[][]{\missingfigure[figwidth=6cm]{Dummy figure}\label{subfig:2}
  }
  \caption[]{I want subfloat links to be russian: (а) and (б) instead of (a) and (b).\label{fig:1}}
\end{figure}


\end{document}

Answer 1

Add

\renewcommand{\thesubfigure}{\asbuk{subfigure}}

after \usepackage[lofdepth]{subfig}. For subtables, use also

\renewcommand{\thesubtable}{\asbuk{subtable}}

You might want to ping Arthur Reutenauer at https://github.com/reutenauer/polyglossia asking for including \asbuk in the documentation of Polyglossia.

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Note. Avoid \setromanfont and \setdefaultlanguage, which simply do again what \setmainfont and \setmainlanguage specified. They are obsolete commands, retained for backward compatibility.