If the game isn't in English by default, you might look for an English patch or an English version of the game itself. Official game websites, forums, and digital distribution platforms like Steam usually have versions of games in multiple languages.
First, ensure you have a legitimate copy of "Sniper: Art of Victory". You can purchase it from online stores like Steam, GOG, or other digital distribution platforms.
If "Sniper: Art of Victory" doesn't natively support English, or if you're looking for a patch: