[Dbix-class] Relationship to serve internationalization

[vti]

we have two tables

one is for original language
==================
package DB::Ministries;

use base 'DBIx::Class';

__PACKAGE__->load_components( qw/ PK::Auto Core / );

__PACKAGE__->table( 'ministries' );

__PACKAGE__->add_columns( qw/ ministryid
                              lang
                              content
                              / );

__PACKAGE__->set_primary_key(qw/ministryid/);
==================

the second one is for translations
==================
package DB::MinistriesI18N;

use base 'DBIx::Class';

__PACKAGE__->load_components( qw/ PK::Auto Core / );

; __PACKAGE__->table( 'ministries_i18n' )

; __PACKAGE__->add_columns( qw/ i18nid ministryid
                                lang
                                content
                              /
                          )

; __PACKAGE__->set_primary_key( qw/ i18nid / )

; __PACKAGE__->belongs_to( 'ministryid' => 'DB::Ministries' )
==================

so we have to decide what relationship is between original and i18n
version, i tried

__PACKAGE__->might_have( 'ru' => 'DB::MinistriesI18N'
                       , { 'foreign.lang' => 'ru'
                         , 'foreign.ministryid' => 'self.ministryid'
                         }
                       , { acessor => 'single' }
                       );
but probably it is not right, besause it complains about 'foreign.lang' =>
'ru'

when i used Class::DBI i wrote my own relationship, but in DBIC i found
different method, such as writing condition while writing relationship

what i want to get is:

ministry.ru.title gives me title from i18n, while ministry.title gives the
original one

i would be appreciate if someone could show the way where i should search,
read or understand

thanks anyway