Localization testing: The program is modified to present 
its user interface in a different language and/or following 
a different set of cultural rules. Localization testing may 
involve several old tests (some of which have been modified 
to take into account the new language) along with several 
new (non-regression) tests

Black Box Testing 
Testing is based on behaviour of the application .
in black box testing testers does not require code language

White box testing
testing is based on internal structure of the application
in white box testing testers requires code language

      

Localization testing :it is used to check the langauge 
contents
Muralidharan

After getting the stable build the testing team deliver the 
build to the client with required documents.  Then we will 
conduct the testing at custemer environment whether the 
application is compatable in custemer environment or not 
is called the localization testing.

Testing the application in different language is called 
localization testing here we pay attention towards three 
things 1) UI testing 2) functional testing 3) language or 
region specific areas like keyboard strokes "character 
sets" . we make conversion documents so that we easily test 
the application . functional testing is pretty difficult 
here for that one should know the language...

Localization testing is done to guarantee that the 
application will work properly in different languages (i.e. 
Win 95/98 English, German, Spanish, etc)