I cannot get this dynamic sender profile to populate a dynamic Reply-to email address using a field from a non-sendable data extension (something that should be easy but its turning out to be really difficult). I understand that the Sender Profile is evaluated before the email, so the ampscript from the email cannot be used.
Therefor, I have attempted to create a content block and put this ampscript in it:%%[
Set @language_email = language_code
Set @Replyto_table = "Ashley_Reply_To"
Set @replyto_match = "fromReply"
Set @replyto_translated = Lookup(@Replyto_table, "language_code_reply", @replyto_match, @language_email)
Then I retrieve the content block using this script in the Sender Profile: