Besides, I presume the CIA factors that into their recruitment. Clearly, they don't need ineffectual communication with foreign assets so they would control agents who do just that. I imagine if Mormons are employed en masse, it would be for translations of already recorded data.
Not only does this seem like a gross generalization but it also isn't responding to anything the parent commenter said - where does it say that Mormons are also over-represented in the population of interrogators?
As others have pointed out, you made a quite a sweeping generalisation. What I will add is that what other general groups of people have more emphasis and training on teaching skills and not because it's directly applicable to their career? I'm a Mormon. We have manuals (Publicly available, for example, Preach My Gospel[1] and Teaching, No Greater Call[2]) that focus on asking good questions, empathy and rapport, lesson plans (Interrogation plans?), understanding those you teach, studying and using resources (Scriptures), how to tell if the students are learning, different teaching methods, listening skills, etc. From an early age we have opportunities to teach too and this continues on forever—much to the disdain of some members though haha.
On my mission I spoke with everyone from those in prisons to the general populace to someone running for president of the country. He did become the president too. I/we did quite well in conversing with the apparent equivalent of foreign informants in the context of this discussion.
Well then full-disclosure, I'm a Mormon, I served the usual 2-year mission speaking Spanish, and I used to work on said software :)
The church operates Missionary Training Centers with the main one in Provo, UT and other smaller centers distributed around the world. When somebody starts their mission they go there for a few weeks for a crash course in how to teach religious priniciples, the policies for missionaries, etc. A lot of missionaries are assigned to foreign countries or even language-specific assignments in the US. Those missionaries stay for 2-3 months to learn the language. It tries to be a fairly immersive program, taught by native speakers of the language and former missionaries, and has a fairly significant software component to it as well. I don't know specifics first-hand, but it was widely spoken about that groups in governments, etc... would visit to learn more about why the program was so effective in so little time. I don't think it's entirely the software, it's a pretty good program all-around - but it's certainly nothing to dismiss.
edit: The main website is http://www.mtc.byu.edu, but as language learning consulting is hardly their main goal, I doubt you'll find much more of an answer to your question there.
