(OO) Support Tip: How to change the UI language/locale of Studio
The UI language/locale of Studio is configurable by modifying the following settings in C:\Users\<STUDIO_USER>\.oo\Studio.properties:
Set a language code and a region(country) code for your preferable language to the above settings respectively and restart Studio.
Each code is from Java locales and needs to be from one of locales that OO supports. For example, user.lanauge=ja and user.region=JP are for Japanese, and user.language=en and user.region=US are for English.
This works in the latest version(2018.05) of Studio as of writing too.