That’s why you shouldn’t thank them for their service with mere words, but with song. A rousing round of God Bless America sung by the entire room is how you properly thank service members. Remind everyone in the audience that if they don’t join in, it’s because they hate America.
I’m not sure you really need an interpreter to say “march forward” and “get killed.” Seems like a simple enough message. You could probably use hand signals.