Languages Other Than English - Characters

[Sovereign]

Does anyone know whether it is possible to create extra buttons in the WYSIWYG Editor for one-click insertion of characters such as ì and ä? Using BBCode is clumsy. That is, the BBCode shows up like this [SPECIAL-I][/SPECIAL-I]. I want just the "ì" to show up from clicking the button (I know how to add buttons).