I have Issabel, partially translated to PT_BR.
Some modules are not 100% translated, in some cases, I do the translation of "CallCenter" "My Extensions" manually.
The problem is that I have to do this manually around the clients.
Currently I change the default theme, just copying and pasting the folder.
But is there any way I can make these changes to PT-BR module by module, and create an ISO installation disc, so that I don't have to keep changing it?