If the methods above fail, you likely have a version of the game where the English audio files were physically stripped out to save disk space (common with the "Ru-version"). In this scenario, simply changing a setting won't work because the files do not exist on your computer.
While Sniper Elite V2 is celebrated for its iconic "X-Ray Kill Cam" and deep ballistic mechanics involving wind and gravity, the narrative provides the necessary context for these actions. --- Sniper Elite V2 English Language Pack Download
If you own the game on Steam, this is the safest and most reliable way to ensure English files are downloaded correctly. Steam Library Right-click Sniper Elite V2 (or the Remastered version) and select Properties Navigate to the from the dropdown menu. If the methods above fail, you likely have