In the edit screen documentCode should have a lang field.
correct bug #3 (https://github.com/IRI-Research/plan4learning/issues/3)
#!/usr/bin/env python
import os
import sys
if __name__ == "__main__":
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "p4l.settings")
from django.core.management import execute_from_command_line
execute_from_command_line(sys.argv)