from werkzeug.routing import Map, Rule, Submount

map = Map([
    Rule('/', endpoint='#language_select'),
    Submount('/<string(length=2):lang_code>', [
        Rule('/', endpoint='index'),
        Rule('/about', endpoint='about'),
        Rule('/blog/', endpoint='blog/index'),
        Rule('/blog/<int:post_id>', endpoint='blog/show')
    ])
])