User blog comment:JPulowski/The Witcher 2: Patch 1.3 and new DLC available/@comment-91.215.144.2-20110726124814

Patcher_RU.exe does not change file ru0.w2speech. So there is no sound in dialogs. When setup 1.0 -> 1.2 and 1.2 -> 1.3 everything is ok.