• It is a type of non-functional testing.
• Internationalization is a process of designing a software application so that it can be adapted to various languages and regions without any changes. In Internationalization Testing the tester checks to see if the application successfully adapts to other languages and regions without changes.
• Whereas Localization is a process of adapting internationalized software for a specific region or language by adding local specific components and translating text. In localization testing the tester checks to see if the application looks and behaves as expected after localizing the application.

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