Are not people who are fluent in more than one language actually developing different personalities? So conflicts would occur with others because it is not obvious to another who you are - someone from the old country, someone from the new country, or both.
I wouldn't say different personalities, but I would say someone who speaks more than one language develops different "cultures" i.e ways of thinking and ways of viewing the world. Because each language carry its own way of viewing things, e.g. in Russian there is two different words for light blue and dark blue, so they consider those to be two different colors instead of two tones of the same color. Just like in English we have two different words for pink and red, therefore we consider those to be two different colors yet in reality they could be just two tones of the same color...
I admit I could produce an whole essay about that (and I actually did in one of my English classes when the subject was free
). I speak French and English, I'm learning Spanish and I study in languages. So yea, this is a subject which I find fascinating.
To answer your question, I
think you
could consider it the other way. Let's take a Muslim convert as an example. This convert doesn't speak Arabic at all. Then he becomes more and more devout. He becomes very religious. His religiousness might be an important motivation factor to learn Arabic.
Yet of course, there are plenty of other factors that matter in order to be a good language learner and become fluent in a language, so religion is just one of those factors in that case.
However, I don't think there is a correlation in the other sense (i.e. a Muslim who speaks Arabic and want to learn another language), because speaking another language is not an obstacle to religiousness whilst in the first case speaking Arabic could be considered an important part of being religious (to read the quran in its original language for example).
Topic: Languages