Matching Hebrew text in ElasticSearch percolator

Hello all,

I want to use the percolator to find matches in Hebrew texts.
I've set up a simple test which works for English terms and text but
doesn't work on Hebrew text: https://gist.github.com/1509532

Is this possible without a Hebrew analyser and tokeniser? I know it's
possible in Lucene (without stemming and inflecting of course, but I
can do without for now)

How can I get this working?

Thanks in advance,
Simon