Hello Hans, there is a little bug in conversion of French hyphenation patterns in ctxtools. I guess that these two patterns 1c\oe0 % final zero essential to terminate cs \n{1c\oeOT} % for \oe in OT1 _and_ T1 font encoding should result in a single pattern 1nœ while it results in two weird patterns: 1nö0 1nöOT \oe is converted into ö instead of œ (are there any similar bugs as well?), 0 can probably be removed, \n{...} should probably be ignored and \oeOT should be ... well, it's inside of \n anyway, so it doesn't really matter what you do with it as long as you remove the pattern, but definitely it should not result in uppercase OT. Mojca