[BRLTTY] Problem with the character 'en dash' (U+2013) in output

[André-Abush Clause]

Hello,
I'm encountering a strange problem for a while that I'm unable to solve:
The character en-dash (\x2013 -> –) always displays as a simple dash 
(\2D -> -).
However, that it should not be the case according to several definitions 
in some text tables.
E.g.: ⢉ (148) in `hr.tbl`, ⣈ (478) in `fr-2007.tbl`, ⢤ (368) in 
`is.tbl`, etc..
There is no problem with Braille keyboard input.
Do you have any idea where the problem is coming from?
Cheers,
André