Some versions only support a local language (e.g., only Russian audio or only German audio).
Passionate fans have created unofficial translation patches. The Hungarian community, for instance, has released fan translations for the base game and its DLCs.
A: Searching the Steam Community hub for "Wolfenstein II language pack" is the best way to find links shared by users.
You might have English subtitles, but the audio is missing, resulting in silent dialogue.