Russian translation done. Here is the file.

Hi there.
Here is the translated file for Russian language.
It is full and final.
This is UTF-8 file without BOM.

Please upload it to your server.

Please change two strings in the translation to this ones:

HIKA_NAME="Имя пользователя"
HIKA_USERNAME="Логин"

previous translation was not so correct.

And please correct this line:

FIELD_LABEL="Название поля (на русском)"
FIELD_COLUMN="Алиас поля (английский)"
DISPLAY_BACKEND_FORM="Административная часть сайта"

please correct this lines:

CONTACT_REQUEST_FOR_PRODUCT="Вопрос по товару '%s'"
CONTACT_US_FOR_INFO="Задать вопрос по товару"
SEND_HTML="Отослать HTML"
DISPLAY_CUSTOM_ITEM_FIELDS="Отображать дополнительные поля"
FIELDS="Дополнительные поля"
CORE_FIELD_DELETE_ERROR="Вы не можете удалять основные дополнительные поля. Но в то же время, вы можете снять их с публикации."
ORDER_STATUS_CHANGED="Состояние заказа изменено на %s."

I have translated all new strings for HS 1.5.7
Here is the full file
There was some minor changes in previous strings so please update it full.

Thank you.
I have found some spelling mistakes in my translation. Sorry.
Also I changed strings for cron tasks and make some minor changes for more clear understanding.

here is new file.
change it full, please