I'm using the latest version of THE (excellent editor++!!! Thanks) under linux.
I enabled extended characters by setting SET ETMODE ON 32-255.
The problem is that accents are not displayed. Instead there are 2 squares.
The solution is quite simple.
In the file "the.c" you have to include "locale.h" and just before the initscr() you have to add a call to setlocale() like this:
This simple code enables accents.