By default Zend Studio does not allow to change interface language to Russian. I found simple trick to do so. Go to the config folder (config_5.0 for Zend Studio 5.0 and config_5.1 for 5.1 version). This folder usually placed under c:\Documents and Settings\<Your Current User>\ZDE\.

Then open desktop_options.xml file and find following strings:

You need just to change language attribute to ru and country attribute to RU. That’s All!

Today I’ve found very nice theme for Zend Studio in the Parabox Blog. Here are some screeshots:

Other screenshots and this theme file you can find here.