Question: In Season 7 Episode 10 (and others) it's said that the TARDIS has a sort of "universal translator", even after the TARDIS leaves the submarine, they can understand and speak Russian. How come in this episode, they can't understand the aliens, for the most part, as they come out as a bunch of grunts, even though the TARDIS is in the area?
Answer: The TARDIS is shown to dislike Clara, and could very likely be giving her issues with the translation for that reason. Also, because it's funny to see the Doctor barking like a dog.
Chosen answer: The only one that grunts is Dor'een, the alien trying to sell the moped. The reason for this could be the same reason why the TARDIS does not translate baby, horse or tree, to the others. A plot device just to show off the Doctor's intelligence.
MasterOfAll