translate one char to 2 or more chars

Hi,

In French Math ASCII Braille, { should be translated with 2 chars : ¥
and ?
so I defined the entity
<!ENTITY accog "&#165;?">

and put later in my stylesheet
  <xsl:value-of select="translate(.,'{','&accog;')" />
but both saxon and xt consider give me only the first char (#165;) for the
translated "{". (and if I put a char after { this char is translated into
? ).

I tried also to define
  <!ENTITY accog "&#xA53F;">
but then saxon tells me "Output char not available in this encoding
(decimal 42303)" (iso-8859-1) and xt gives me mist.

Do I have to use the powerful but heavy "replace-string" template or is
there a way to achieve what I want with xsl:translate ?

Thanks a lot in advance.
Frederic SCHWEBEL



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