Testing Internationalized Software Using Test Resource File and Test Font

An efficient testing method is provided for internationalized software executed in a plurality of language environments. The method includes mock-translating an externalized resource file written in a first language of the internationalized software by converting characters of the first language to characters of a second language based on a conversion table; and displaying output information from the internationalized software that performs processing by referring to the mock-translated test resource file using one of a plurality of fonts prepared for respective test categories.