If English doesn't show up in the menu, ensure the files are named exactly as listed above and are placed directly in the Data folder, not a subfolder.

the English language pack (usually a file named dt20_eng_win.cpk for text and dt41_eng_all.cpk for commentary).

Is your game the official or an offline repack ?

Adds the iconic voices of Peter Drury and Jim Beglin.

– Version 9.x includes full English text and commentary, plus updated transfers and kits.

For a visual walkthrough on adding English files and commentary to your game, watch this tutorial: