Question:

How to translate the "Submit" and the "* INDICATES A REQUIRED FIELD" labels/messages on the Survey iFrame?

Answer:

The items can be translated using the following Veeva Messages:

•  "* INDICATES A REQUIRED FIELD" = REQUIRED_FIELDS_TEXT;;Surveys
• "Submit" = SUBMIT;;Common

Note: You should not change a delivered Veeva Message. If you do, it will be overwritten when your Veeva application is upgraded to a new version. If you would like to change a Veeva Message, mark the original record as Inactive and save it. Then, clone the Inactive record, mark the new record Active, then enter the new text in the Text field and modify the External ID (as it is unique). Do not change any other values in any other fields. You cannot add or delete any fields on this object.

Related Documentation:

CRM Help Documentation: Surveys in Approved Email