That may not work. If it doesn't work for you, you could change the source code. Look at file class.umlautmentionsformatter.php
Wherever you find "preg_something/.../i" add "u" behind the "i"
For the latest file at GitHub https://github.com/R-J/MentionsPlus/blob/master/class.umlautmentionsformatter.php it will be in lines 15, 36, 43, 52, 60
Comments
That may not work. If it doesn't work for you, you could change the source code. Look at file class.umlautmentionsformatter.php
Wherever you find "preg_something/.../i" add "u" behind the "i"
For the latest file at GitHub https://github.com/R-J/MentionsPlus/blob/master/class.umlautmentionsformatter.php it will be in lines 15, 36, 43, 52, 60