In america we use . instead of ,'s. Any way we can change it?
The language/locale is set in System Preferences, Language & Text. The language chosen in the Language tab determines the translation used, and the setting in the Region tab determines things like dot/period for number formatting. (That's for 10.8, in 10.9 the section looks a bit different.)
Language is set to english. I cant find the region tab (I use 10.7.5.) Where can I find it?