After massive finding and trying, I have to say there is no such way. There are some brutal solutions, but compared with them, adding one jar file to project is much easier and nicer.
I will cite best working solution for me:
You need to download a language pack from here:
http://archive.eclipse.org/eclipse/downloads/drops/L-3.2.1_Language_Packs-200609210945/index.php
NLpack2-eclipse-SDK-3.2.1-gtk.zip works for me while I'm using Eclipse 3.7.2.
Extract org.eclipse.jface.nl2_3.2.1.v200609270227.jar (or other nl for your language) from the archive and add it to your project. It will be used automatically.
This do not let you to set texts on buttons, but at least gives you texts translated into your language.