How Do I Enable Closed Captioning On My iPad?
Yes, if you have videos stored in the Videos app you can enable closed captioning through the Settings app. Launch Settings from your iPad home screen and select Videos. Then switch "Closed Captioning" to the on position.
If you can't find that option (which may be the case for newer versions of iOS), open up the Settings app and go to Accessibility. Look for the button labeled Subtitles & Captioning (it's pretty far down), tap on it and switch on Closed Captions + SDH.