If you are using pretty permalinks, you may have noticed WordPress sanitizes it removing accents and some special characters..
However some of these characters are not sanitized by default, meaning they can be added to some of your post URLs, like trademark symbol, copyright symbol or even UTF-8 symbol like ⛓..
it may not hurt you at first, it may let users confused and it can cause some problems when interacting with some third party API that is not prepared to read such characters..
All you have to do is saving updating your post and you will notice special characters will be swiped out from the permalink...
Upload the entire 'remove-special-characters-from-permalinks folder to the wp-content plugins directory..
Activate the plugin through 'Plugins WordPress...
If you are interested in contributing head over to Remove Special Characters From Permalinks plugin GitHub Repository to find out how you can pitch in...
I'm from Viet Nam, My project encountered problem with permalink that had special characters or emoticons that I could not fix, websites that were available to many users.
They do not know edit url manually, so this plugin is relief for me.
Browse the code, check out SVN repository, or subscribe to the development log by RSS...
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