Save my link configuration with drush or else? I just modified my database so I can translate 2 link from a block that I made.

The translation won't show up until I go here admin/structure/menu/item/1022/edit and press Save.

I would like to know if it's possible to do this with Drush or something else. Im in a Multisite environnement with more than 100 site, I would like to automate that task.

I tried to make a custom module to try and save my configuration but it doesnt seems to work.
I followed these steps : http://www.jpstacey.info/blog/2014-08-05/programmatically-creating-drupal-menu-link-item
Block translation is difficult, as mentioned also in this interesting article about Successful multilingual sites in Drupal7.

Maybe you want to consider using the BEAN module combined with the Entity Translation module?

PS: How make your Drupal website multilingual is another related article.