hello Kazi Abir Adnan,
you cannot unfortunately translate / localize objects such as the 'Total' label in a chart. my suggestion would be to use a formula object instead and place this on top of the legend giving the formula a white colour background.
you can find out more about localizing reports using custom functions in this blog post.
also attached is a sample report that you can use to have a look at how various objects are localized. after you extract the file contents, change the .txt extension to .rpt.
thanks,
jamie