If AI email translation fails, does your customer still get the message?

A support email can leave the queue without becoming readable to the customer. Zendesk's existing conversation-translation guide says that if translation fails on an outgoing email, the email is still sent in its original language after five minutes. That is a documented fallback, not a failure I've reproduced. For a team using AI translation to serve customers in another language, I'd ask the admin how staff can find those failed translations before calling the rollout ready. Then agree what happens to a time-sensitive reply: who arranges a readable version, and whether the customer needs more time to respond. Imagine a return instruction with a deadline. Sending the English version to someone expecting Spanish may keep delivery moving, but it doesn't settle whether they understood what to do. That's a scenario to plan for, not a reported incident. Would your team notice the translation failed, or only notice that the customer never replied?