I\'m using gettext in a MAMP environment. I have locale files for es_ES, ca_ES, en_US and gl_ES. No problem with the firs
es_ES
ca_ES
en_US
gl_ES
This should do the trick:
cd /usr/share/locale sudo cp -R es_ES gl_ES
Then open a new terminal session and list the locales again. Galician should be there :)