font display problem - any ideas??

Hi,

I'm currently living in Japan and thought that my language skills were probably good enough to switch the system language over to Japanese... but after realising that I wasn't as good as I thought I ended up switching everything back to English. But now the fonts in some of my programs have gone weird. The worst is iPhoto... under 'events' the name of the event is no longer centered... and the text saying 'show hidden photos' has moved completely. In the dictionary widget it no longer says 'thesaurus' but only 'thesauru'. etc.

I waited until an update came out for iPhoto (thinking that updating it might solve the problem)... but I just installed it and it didn't work.

Any idea how I can get it all back to normal?

I hope this all made sense... I tried searching for similar issues but wasn't really sure what to search for... so apologies if it is a repeat question.

Thanks.