I helped two old Hmong ladies order chicken flavor noodle soup at a Vietnamese restaurant about 20 years ago.
They did not speak English and certainly didn't speak Vietnamese. The Vietnamese servers there spoke both but not Hmong.
I channeled the communications by speaking Hmong to the two ladies and then turned our talk into English for the Vietnamese servers.
If you don't think that was hard and, therefore, a substantial contribution, think about how long it takes to learn two languages to the point where you could also interpret correctly between the two. And the very fact of helping two ladies get not just foods but yummy foods of their choices is superior to anything at that spot at that time.