We found, that there is not possibility now to change/translate RADIUS response messages from Identity Router.
Because changes based on previous authentication mechanism, it's little bit complicated to make universal manual for end users. It would be great to get possibility to translate this messages to another language and make them easier for end user.
For example message "Enter your SecurID OTP or select another method: 1 to Approve on your registered authenticator, 2 for Biometrics" is really tricky for end user who is not speaking English.
