I don't know if there ever was a translation. You can get some
technical information he http://www.gliding.co.uk/bgainfo/tec...ts/wassmer.pdf

It refers to this french original document:
http://www.pilotlist.org/manuels/was...A26_squale.pdf

The French version of the flight manual can be downloaded from Issoire
Aviation:
http://www.issoire-aviation.fr/doc_a..._WA26CM_R0.pdf
or
http://www.issoire-aviation.fr/doc_a...V_WA26P_R2.pdf