model simplification, correct import on language. We do not try to impose a language when none is found. add forgotten abstract field on import.
#!/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)