SEO Links

I have a challenge with consistently supressing an espace name when creating SEO friendly links, let's call it "espace1" which I want to supress the name of.
"" will appropriately serve up "espace1" as there is a site rule in place and the user sees "" in the browser.
Navigating to a second espace in the application via a link on screen will appropriately serve up "".
Then clicking a link from "espace2" back to "espace1" will result in "" but the desired behaviour is for the user to see "" in the browser with same content. 
Any suggestions on how this can be achieved?