Fix south migration problem caused by 0003_update_keys_to_textversion using TextVersion model which is updated only in 0010_auto__add_field_textversion_category_1__add_field_textversion_category, same with 0007_populate_id_key_in_comments using Comment model updated in 0011_auto__add_field_comment_category.

from django.utils.translation.trans_real import translation

def translate_to(value, language_code):
    t = translation(language_code)    
    return getattr(t, 'gettext')(value)