Name of Constant that ES uses for it's Title

For a while I been using a plugin called "title management" to change the title separator from a hyphen to a pipe symbol. Today I decided to try using a language over ride to accomplish the same result. The constant name was "JPAGETITLE" which allowed me to change the separator. It worked for most of my site except for EasySocial. This leads me to believe that ES uses a different constant for it's page title management. So I'm here to ask what the name of that constant is.

By doing this method I can use one less plugin and fix a "title glitch" of ES. The so called glitch I mention breaks the site title (but not the page title) when the site title is inserted via a plugin. If you folks are interested in that case, I can provide addition details.