Sound files are not being installed correctly

Hi, everyone.
I’m trying to make asterisk work with a set of Spanish sound files.
“make install” installs all Spanish sounds to “es” folder. Then, I have make a lot of copying around to make asterisk “say” everything in one language:

for every folder in /var/lib/asterisk/sounds:
cd /var/lib/asterisk/sounds/digits; mkdir es; cp…/es/digits/* es/

Just wanted to ask if it meant to be that way or is that an error
P.S. asterisk 1.4.5