REDCap:How to - Survey in one other language
If you want to create a survey in one language that is different from English, your project language can be set to that other language. Ask an administrator to do this change for you. We have prepared three language files (German, French, and Italian) that provide translations for all standard survey text elements. The interface for logged-in users remains in English.
Make also sure that you provide email texts in the appropriate language for emails that you send through REDCap.