Anything where language is essential (e.g. HISTA, Timekeeper, as mentioned above) will have headphones for multiple languages. Many of the cast members speak a decent amount of English, as this benefits many visitors (it seemed like visitors from Spain, Germany, Italy, Japan, etc. were more likely to know some English than French).
Some rides that have narration in WDW just don't have any at all in DLP (e.g. Haunted Mansion, or Phantom Manor as it's known there).
The guide maps to the park are readily available in English.
The parade music was in English, actually.
Restaurant menus come in 6 different languages.
My DH was wearing a shirt from our (American) alma mater, so many cast members spoke to him in English right away, which was kind of funny, as he's half French and speaks it fluently.