Column(foreign_key_name + '_id', Integer, ForeignKey(foreign_table_class.id),
primary_key=True, nullable=False),
Column('language_id', Integer, ForeignKey(Language.id),
Column(foreign_key_name + '_id', Integer, ForeignKey(foreign_table_class.id),
primary_key=True, nullable=False),
Column('language_id', Integer, ForeignKey(Language.id),