After changing default Country and Currency to Australian and changing the display order to 1, all titles changed to loang dotted class names.

examples

Logged In As:  to Admin.Header.LoggedInAs:
Dashboard: to Admin.Dashboard:
Catalog: to to Admin.Catalog:

Countries: to Admin.Configuration.Countries:
Three letter ISO code:  to Admin.Configuration.Countries.Fields.ThreeLetterIsoCode:

Those are only few examples. Actually every title has changed in this format if log as administrator.
Then changed back to US but didn't change. This is a realy serious bug. This software should not be limited to US.

Initially I thought this is a bug in 2.1 and then tried 2.3 and 2.4 all are the same.

Can some one please tell me how to fix this ?