Its our routine ‘life’,we getsup,do our daily cores,routine work and like always after completing the all holy and unholy works,retire to bed.Our body refreshes,feel relaxed and fresh after a sound sleep,but what about the ‘Brain’,the control centre,it never sleeps,instead it thinks and work more freely during our sleep because its not involved in activities of making other parts to move.
Lets come to the main point,during sleep in which ‘Language’it thinks.
Its the very first language you learned,during the very first 6 yrs of your life.Like a new computer in which we install a ’software’,our brains also take up the first language we’ve learned,thats our mother tongue[in speaking term].
The simple way to know,in which language a person mind is thinking,or his mother tongue,is just hit him while he/she is asleep.