Are the working, or is it just the audio that is missing? Did you see any errors during the installation process?
Look for files ending in .pck or .upk with language tags like FRA (French), ITA (Italian), DEU (German), or ESN (Spanish). Are the working, or is it just the audio that is missing
If you only see INT (International/English) files, you must re-run the installer and check the specific language bins you need. Step 2: Editing the Steam_api.ini or Context File Are the working