i don't think its possible only currency symbol you can change and in your regional settings.we cannot modify the main screen and invoice printing.will suggest that as enhancements. go to help and submit as well. 

Dear Drtan,

i do that but its not working can i download any new version of SAGE 50 which support arabic language.... or any other solution...

Best Regards,

Muhammad Waqas

as of this writing i believe none yet.

I can print all financial reports and invoices in arabic or any language i want,

You just need to change the font of the report to a font that support arabic Script i recommend "Simplified Arabic" font,

you also can export your report to Excel and do further modifications from there..

also i would recommend using CrystalReports (some versions of PeachTree have that program added) which is a very powerful tool to design your reports as you want,

as for the PeachTree program interface itself , it's not available in arabic however there are many programs that is used to change the interface of the program text like Lungobit Localizer and Multilizer and ResHacker and PE Explorer