from sqlalchemy.ext.declarative import declarative_base

Base = declarative_base()

import traduki

def get_current_language():
    """Current language callback for our project."""
    return request.locale

def get_language_chain():
    """Language chain (fallback rule) callback for our project."""
    return {'*': request.locale}

i18n_attributes = traduki.initialize(Base, ['en', 'ru'], get_current_language, get_language_chain)

Session = sessionmaker(bind=engine)
sess = Session()

class MyModel(Base)

    title_id = i18n_attributes.i18n_column(nullable=False, unique=False)
    title = i18n_attributes.i18n_relation(title_id)
    """Title."""

my_object = MyModel()
my_object.title = {'en': 'English title', 'pt': 'Portugese title'}
sess.add(my_object)
sess.commit()

assert sess.refresh(my_object).title.get_dict() == {'en': 'English title', 'pt': 'Portugese title'}