Hi, I'm thinking about adding two new primitives called \lccoded and \uccoded, with the following rules for \lccoded (you have to imagine a suitable reverse for \uccoded): \let\ea\expandafter \catcode`L=12 \lccode`T=0 \ea\def\ea\test\ea{\lccoded {Some Little Text \AE ?}} make \test equal to \def\test{some Little Text \AE?} so, no expansion occurs in the <general text> following \lccoded, and only characters with \catcode == 11 as well as \lccode <> 0 will be changed, and nothing else. Would that be usable, or is something else/better needed? Greetings, Taco