How to utilize unique slugs for plugin elements that extend the BaseElement class
Brad, I realize my initial question is a bit vague, oops! I did however find a solution to why my localized slugs for my plugin element weren't being saved as a unique string.

I traced through ElementHelper::setUniqueUri() and figured out I was missing the getUrlFormat() function. Also to make sure I include {slug} in my urlFormat string in this particular case.