Which nid to use for translated node in a menu I'm not using the Entity Translation but only the i18n modules.

For example in the main menu I want to translate "contact us". So in the German translated menu do I need to give the nid of the German version of English node "contact us" ? Or the original English version one?

EDIT: In the figure node/59 refers to English node while the German version is node/800. So for German menu("contact us") which one do I need to feed? node/59 or the node/800. I fed node/59 for all the translated menu items but then they'd all redirect to English one. I thought that i18n should be able to figure and select the translated node automatically. Looks like I'm missing something.
In Drupal 7 you can use Locale core module to translate. 

Locale : Adds language handling functionality and enables the translation of the user interface to languages other than English


After enabling the Locale module , add German language using admin/config/regional/language.


Use English words to create menus.
After creating the menus use admin/config/regional/translate/translate link to translate English string to German.


Search for the string. I'm using About Us to translate. Click the corresponding edit link to translate.


Enter German string