Text Edits on pdf file somehow changed to code or another language. Need help to return to english

Hello, 
I've been adding a bunch of text edits to a pdf menu file for the last few hours when I realized towards the end that most of the text edits I had made now appear like computer code...it's like someone removed certain letters | characters throughout every single edit. I have no idea how that happened to almost every individual edit that I made. But I need to figure out how to switch it back. I had just saved the document thus removing my ability to "undo"...Does anyone know what could have happened to cause this, and (more importantly) how I can fix it so it reads normal with every character visible?

Thank you so much for any help that can be offered.

I'm adding a couple of screenshots where I outlined the areas that I edited with a red border.