Create _lazy translation for models.lang_menu (because ugettext not working in web alphabet submenu

from django.contrib.auth.models import User

from django.utils import timezone

from django.core.exceptions import ObjectDoesNotExist

from django.utils.translation import ugettext as _

from django.utils.translation import ugettext_lazy as _lazy

counter_allbooks = 'allbooks'

counter_allcatalogs = 'allcatalogs'

LangCodes = {1:'АБВГДЕЁЖЗИЙКЛМНОПРСТУФХЦЧШЩЬЫЪЭЮЯабвгдеёжзийклмнопрстуфхцчшщьыъэюя',

             2:'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz',

             3:'0123456789'}

lang_menu = {1:_('Cyrillic'), 2:_('Latin'), 3:_('Digits'), 9:_('Other symbols'), 0:_('Show all')}

lang_menu = {1:_lazy('Cyrillic'), 2:_lazy('Latin'), 3:_lazy('Digits'), 9:_lazy('Other symbols'), 0:_lazy('Show all')}

class Book(models.Model):

    filename = models.CharField(max_length=SIZE_BOOK_FILENAME,db_index=True)