I have one more question. I am trying to configure my RosarioSIS installation on a Windows Computer (WAPP 7.1.24-0) to work in Spanish as well.
On the log in interface for RosarioSIS, I can click on the Spanish flag for the spanish translation and the URL in the browser address-bar will update. However, the user interface still remains in English. I have provided a screenshot here (I blanked out the school name):
During the setup, I have followed the tutorial on how to install RosarioSIS on Windows.
Furthermore, I have checked that the php gettext extension is in fact active using the phpinfo() function. You can see a screenshot of that here: