Subtitles are not "one size fits all" because different edits have different scenes:

Finding subtitles for Dawn of the Dead depends on whether you are watching George A. Romero's original 1978 classic or Zack Snyder's 2004 remake. Since both have multiple versions (Director’s Cut, Theatrical, etc.), you’ll need to match the subtitle file precisely to the runtime of your version. Where to Find Subtitles

: Common subtitle files are split between the Theatrical R-Rated Cut (100 min) and the Unrated Director's Cut (110 min). Quick Tips for Use

: Often preferred for having detailed descriptions of which "cut" the subtitle matches (e.g., Romero's "Extended Mall Cut" vs. "Cannes Cut").

You can find subtitle files for both versions on popular community-driven databases: