If you purchased the game in a German, Russian, or Polish bundle (especially common on retail DVDs or older Ubisoft keys), the installer may only include the audio tracks for that region. The eng0.rda file was either omitted or renamed (e.g., ger0.rda for German).
place it inside a subfolder like \data\ or \addon\ . Anno 1404- Venice ENG Language Pack -eng0.rda-
The language pack provides:
