In I18N testing, first step is to identify all the textual information in the system. This includes all the text present on the application's GUI, any text/messages that application is producing including error message/warning and help/documentation etc. Main focus of the I18N testing is not to find functional defects, but to make sure that product is ready for the global market. As in other non functional testing it is assumed that functional testing has been completed and all the functionality related defects are identified and removed.
I18N testing can be divided in to two parts. First, to make sure that application's GUI or functionality will not be broken with the translated text. Second to make sure that translation of all the strings have happened properly. This activity is called Translation Verification Testing and is normally conducted by person who knows the language very well.
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