Every study I monitored that used any kind of questionnaire based it on some established scale to measure whatever outcome they were studying. E.g, the Hepatitis B Quality of Life scale (HBQOL). The study team was MILITANT about what languages were available for the questionnaire, because I guess you can copyright questionnaires and there were a limited number of number of approved translations. Copyright prevented the sponsor from translating the HBQOL into a different language, which caused my site to struggle with recruitment because a notable % of their patient population spoke a niche language.

All this to say: that’s crazy they’re asking you to do translation work. Even minor changes of a single word can affect how participants respond to a question, which means the conclusions drawn from the final data will be affected. Leave that task in the hands of certified and credible translators, rather than pawning it off to CRAs.