> Is there an easy way to bind the redefinition to certain lanugage envirnoment?
I can add that to Polyglossia, but I need to think a bit about the interface, particularly for Sanskrit that can used with many scripts. The best would probably be for you to start suggesting an interface, but: > If we redefine ṭ in the way described, then we cannot use it when we switch > to Sanskrit > printed in Devanagari. Most convenient would be an automatism that would > switch off > the redefinitions whenever we say \begin{sanskrit] That can't work, since you're working with Sanskrit in both cases (in Latin transliteration, or in Devanagari). The script is the discriminating criterion in this case. Best, Arthur -------------------------------------------------- Subscriptions, Archive, and List information, etc.: http://tug.org/mailman/listinfo/xetex