Hello,
 I'm trying to compile a product of a complex structure (env +
project + product).
 - My useMPgraphics are included in a product using input
 - My environment starts with :
     enableregime[utf8]
     useencoding[ffr]
     mainlanguage[fr]
 just before startenvironment (else the horizontal spacing are not ok
for my products, compiled as standalone documents)
 As is, the metapost processing halts on 
 ! Illegal suffix of declared variable will be flushed.
                    {
 l.149 path theshapemathortext {
                                 ;}{;}
 If I comment out *only* mainlanguage[fr], metapost's processings are
OK but I have english labels (Content, Chapter...) instead of french
ones (obviously).
 If I comment out *only* useencoding[ffr], metapost's processing
areOK but horizontal spacing for punctation are not OK (i.e. with
respect to french typographic standards).
 My question is : how I can obtain french labels + french punctuation
SIMULTANEOUSLY ;)
 I use the up-to-date context/metapost from minimals... And I can't
use MK IV since I need t-vim...
 (useencoding[ffr] is not known by MK IV as typeSTUFF from t-vim)
 Renaud