This is a small datadisc for the first game, it was released as a free supplement for fans, and distributed in the Czech Republic and Slovakia via gaming magazines, then released to all owners of the original game for free.
To run this game you need Viectong 1 installed, the language of the datadisc is therefore apparently adapted to the language of the installed Viectong 1.
English 
Comments and reviews
I tested this addon and yes, language is depends on the version of the original game
No comment nor review for this game at the moment.