This happened in my early tanking career. One night, one hour before maintenance, I decided that I wanted to give a duty one last go for the night. I register for a duty as a Paladin, and I'm immediately pulled into a run-in-progress.
"Gee, I wonder why the other tank isn't here," I wondered ironically. I didn't know it at the time, but I had my answer the very second my party mate replied... in Spanish.
Okay, I thought, kicking off the run.
We're doing just fine for a while, and then I realize I'm DEAD! Yes, DEAD. My death came about as sudden as that phone call the morning after prom night, from your girlfriend, who's telling you, "I'm pregnant!"
Anyhoo.
It turned out that that Spanish-speaking buddy was... the healer. Yes, the healer. I immediately, immediately, immediately, immediately saw what went wrong: he was still in Cleric Stance, and he made no effort to heal me. Ever. It was about as scary as visiting your 39-year-old drunken in-laws on Thanksgiving night, and finding out your boyfriend is out cheating on you with another man. It was THAT SCARY.
Anyhoo.
I tried to say, "We got this, guyze! >_<~b" or something, and the healer said, "I don't speak English" -- in the auto-translate. "Well, that's just great," I thought. I couldn't figure out how to talk to him.
Then the nightmare began.
The minute I respawned, the healer was darting through Copperbell faster than Mario 64 when his butt catches on fire, except I wasn't laughing.
He pulled every single monster along the way, all the way to the first boss room, while I was standing there asking him, "What's going on?"
"I don't speak English" He dies. I should add right now, that I tried to pull one of the monsters off a DPS who tried to catch up with him. The healer was in the boss room, and I was deader than your dead-head 49-year-old grandmother at a Grateful Dead concert.
I was THAT DEAD.
I get irritated and ask, "Who's the leader?"
"I don't speak English."
"Okay, well..." I leave.