On Wed, Dec 09, 2015 at 06:16:35PM +0100, Frédéric Grosshans wrote: > * use your own casing rule and add a ZWNJ (zero width non joiner character) > such that ss↔SS and ß↔S+ZWNJ + S. Wouldn’t ZWJ be a more logical choice given that he wants to “join” both S’s into a single character. Regards, Khaled