Different fonts as in user selectable to use in email/sms/mms or as in what you see in menus/on screens?
For email/sms/mms sorry to say no.
If it's the latter you are looking for, this can be done with a custom theme.
Obviously, it's possible to install fonts or else the Japanese or Korean one wouldn't work, but RIM has not provided any tools for people to make such fonts. It is possible to include fonts with a custom application, but they are only available within the app.
I have recently download 2 apps that allows your font on your blackberry handset to change... click the link(s) below to obtain the apps
these apps a re user-friendly.... you can download them via you blackberry handset... to do so type "Fonts Ultimate Free" or "Extra Fonts" in blackberry app world search bar and hit the enter key.. please leave feed back to let me know if this was helpful
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