What to do when a guest has communication difficulties?

In general, it is important to be respectful and assume that the guest is doing their best to communicate, and the problem is more frustrating for them than it is for you. If the problem is due to language barrier, try to find someone who has experience in that language (even if they are not fluent-- they still may be able to help communicate key Words and concepts). If it is due to speech impediment, thick accent, or they are simply talking too quickly or quietly, respectfully ask them to speak up. Repeat your interpretation of their request to ensure that there is no miscommunication, punctuated with, "I just want to make sure I understand."