There's already a check in Nav.php for whether or not the current user has any additional identities so I was thinking of using that to swap out the label and icon so it shows a user icon with a "+" and says "Add Account" but if they already have one (or more) it would be the arrows and "Switch Accounts" (or does that sound too formal and businesslike for Friendica, perhaps "Add Profile" and "Switch Profiles" would better?).