We received the heret-

In playing civilization 6, I encountered a leader response that seemed quite puzzling to me. I met another civ (Spain), who was neutral towards me. A few turns after I encountered him, he sends me a trade delegation. Wanting to return the favor, I send one back, and receive a strange response:

"We received the heret- I mean, your trade delegation. I will be sure to instruct them in our ways."

What does this mean, and what was he trying to say that starts with heret-? I can assume that it would be something I wouldn't want to hear, so is it a hostile or ungrateful response?

Solution 1:

It looks to me like the leader was going to say "heretics" and caught himself before completing his insul- I mean, clarification. Since you mentioned it was the leader from Spain, this makes sense since they excel at spreading religion.