[XeTeX] Polyglossia/Split Hebrew footnote between pages

[sjo]

I am writing an English document using \begin{hebrew} to insert Hebrew
text where necessary. Sometimes I have an English paragraph with a
footnote that is a long piece of Hebrew text. So I use a macro such
as:

    \usepackage{polyglossia} ...

    \def\hfootnote#1{\footnote{\RL{\hebrewfont #1}}}

to insert the Hebrew footnote (I tried a variety of approaches
including \texthebrew{} in a \footnote, but ran into a variety of
problems).

The above macro works well, except that it does not split footnotes to
the next page thus creating short pages that do not look good. It
keeps the whole footnote on one page.

Any suggestions would be very much appreciated.

Jon