InteractX foreign language support instructions work for 8 bit Unicode languages but need additional steps to support 16 bit Unicode languages also known as Multi-Byte Character Sets. One of these that I will describe is Cyrillic for the Russian language but any Multi-Byte character set follows the same steps.
The first step to supporting the foreign language is the creation of your keyboard layout by modifying the RTLanguage_enu.cfg (English Runtime Keyboard character map etc..) to your language of choice. Then saving it as RTLanguage_rus.cfg in the case of Russian.
The linked PDF file has step by step instructions how to turn on Windows 7 support for multi-Byte Unicode Language support for non-Unicode programs like InteractX.