It’s working now for when there are user set locales and for when ‘set locale from accept language header’ is true. I still want to change the way it is loading the locales.
You can try it out here: http://constructivelearningspace.com/
We’re trying to set up an informal group for teaching/learning Persian. It’s just getting started. (I’m still trying to find the letters on the keyboard 
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edit: I’ve changed the plugin so that it does not switch the locales for anonymous users. This is because I am using it on a forum where I have the setting ‘set locale from accept language header’ set to true. (Although I have limited it for now to only accept ‘en’, ‘fr’, and ‘fa-IR’). The reason for using this setting is to allow users to sign up for the site in the language they are most comfortable in. The problem this creates for the plugin is that it needs to know what language to switch back to when it is leaving a localized category.