"Mmm. True." he nodded, smiling slightly. "If you know Kurdish, it is the same type of speech patterns, you should be able to pick up Parsi fairly quickly." He wasn't going to brag to John about the fact that he knew Arabic and Kurdish as well, along with quite a few other languages. If it came up, he would.

Why was John taking these long looks at him? He noticed the side eye that John had given him before looking out the window. Sherlock sighed softly to himself and looked out the other window, watching the city go by.