I've created a translation file (I use r18n - https://github.com/ai/r18n) and it works! You just replace <activerecord> key with <data_mapper>.
data_mapper: attributes: user: confirmation_code: код confirmed: подтвержден contacts: контакты created_at: создан current_password: текущий пароль email: эл. адрес name: имя (полное) password: пароль password_confirmation: повтор пароля phone: телефон remember_me: запомнить меня reset_password_token: ключ -- You received this message because you are subscribed to the Google Groups "DataMapper" group. To unsubscribe from this group and stop receiving emails from it, send an email to datamapper+unsubscr...@googlegroups.com. To post to this group, send email to datamapper@googlegroups.com. Visit this group at http://groups.google.com/group/datamapper. For more options, visit https://groups.google.com/groups/opt_out.