multilingual python web app with babel

gistfile1.py

# get all langs from db
all_available_languages = [a['lang'] for a in cur.fetchall()]

def get_lang(lang):
    default = 'en'
    mo_dir = os.path.join(os.path.abspath(os.curdir), 'locale')
    domain = 'musicfilmcomedy'

    langs = [lang.replace('-', '_')]
    langs.append(default)
    loc = i18n_tool.load_translation(langs, mo_dir, domain)
    cherrypy.response.i18n = loc
    cherrypy.response.current_lang = lang
    i18n_tool.set_lang()

class Primary(object):

    backend = JsonBackend()
    def __init__(self, lang='en'):
        self.lang = lang

    def _render_template(self, filename, **kwargs):
        '''Set up each template with required data'''
        template = mylookup.get_template(filename)
        get_lang(self.lang)
        kwargs['lang'] = self.lang
        kwargs['_'] = _
        return template.render(**kwargs)

    @cherrypy.expose
    def index(self):
        return self._render_template('index.html')

class Root(Primary):
    def __init__(self, langs):
        Primary.__init__(self)
        for lang in langs:
            setattr(self, lang, Primary(lang))

application = cherrypy.Application(Root(all_available_languages), '', config='musicfilmcomedy.conf')