On Sat, 1 May 2004 23:28:02 -0700, Philippe Caquant <[log in to unmask]>

>So, some reasonable answers could be: 1/ English; 2/
>English + 3 or 4 main European languages (German,
>French, Spanish...): war in sight ! 3/ Esperanto or
>Ido (because they exist already); 4/ International
>pictograms (not possible for every case, and Internal
>Pictionary still to be made); 5/ ???

For Case 4, there's already Blissymbolics:

I think this extensive pictographic system is quite aesthetic.  The
symbols are good enough for T-shirts...