Translation of interface without admin menu

Hi,

How can I translate the interface of the site without Drupal 7 developer menu?

I installed these modules:
– entity_translation
– l10n_update
– i18n

But now it translate the whole site, everything (without content) including Drupal menu and administration interface.
But I would like that it stays English.

Drupal version: 


Source: https://www.drupal.org/taxonomy/term/22/feed