Setting the 'lang' option in schooltool.conf breaks the server

[Fabián Rodríguez]

Setting the 'lang' option to anything as indicated here breaks the server:
http://book.schooltool.org/translations.html#selecting-schooltool-s-language

Once lang is set, after restarting the server (sudo service schooltool restart) I get this error:

Unable to connect
 Firefox can't establish a connection to the server at localhost:7080.
  The site could be temporarily unavailable or too busy. Try again in a few moments.
  If you are unable to load any pages, check your computer's network connection.
  If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web.

Setting back any lang option to a comment (by adding # at the beginning) restores normal behavior.

I am looking at using the French version, and this is blocking it.

[Douglas Cerna (replaceafill)]

This is strange. I just edited my schooltool.conf to have:

lang es-sv,fr

and it started showing Spanish (El Salvador) and French. I also tried just:

lang fr

and it works too.

Could you please attach your /var/log/schooltool/paste.log to see what's failing?