Hello Hans,

I'm still wondering why there are certain formats hardcoded in your scripts and how the "make all formats" feature does (not work).

See scripts/ruby/base/tex.rb:

Lines 131-137:
Here are a few languages predefined which texexec "knows". If I want to add a format for another language, I have to add a new line here.

Line 339: 
Here are the "default" TeX formats defined. No problem to consider something as default ;-), but the point is that "texexec --make --all" actually does "make all DEFAULT formats", NOT "make all AVAILABLE formats". :-(

Anyway, the main problem I see is altering of a script which comes with the ConTeXt distribution - the changes made into this scripts must be done again and again after each update.

My suggestion is:
1. To put the format definition into a separate file (like user.rb or so) which won't be owerwritten in any case. 
[Note: cont-usr.tex is a good analogy to this]

2. "Make all" should make ALL the defined ConTeXt formats, not the default ones.

Thanks,
Richard