"Is that so?" For all of his tinkering, for all of his science experiments, for all of his wondering, he had never once contemplated how it was the TARDIS translated languages. He'd always taken it (HER) for granted. "Are the original tongues... well, you said interesting. Which?"
And then his mind flashed to tinkering and being under the TARDIS' grates and in her ducts and he had to blink to remove the images from his mind while simultaneously wondering if their minds were still linked.