Internationalization testing is the process of verifying the application under test to work uniformly across multiple regions and cultures.
The main purpose of internationalization is to check if the code can handle all international support without breaking functionality that might cause data loss or data integrity issues. Globalization testing verifies if there is proper functionality of the product with any of the locale settings.
Testing to check if the product works across settings.
Verifying the installation using various settings.
Verify if the product works across language settings and currency settings.