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"Has the translation been "validated" ?"

Response from the MAPI Institute:

The translation of a questionnaire is considered fully validated after a proper linguistic validation and when its psychometric properties have been studied.

Some questionnaires may have been validated in English and in some other languages. However, it is possible that not all of the languages requested will have been PSYCHOMETRICALLY validated, though they have been LINGUISTICALLY validated.

The linguistic validation process is thought to ensure that the language version will be psychometrically equivalent to the original version, because the concepts are equivalent across languages. However, it is only through actual psychometric testing that you can know for certain if the language version is indeed reliable and valid.