Destructive update.... Let's assume if a third person searches for this train & opens its page he wud not judge the origin station on the basis of regional language but he wud look fr it in the timetable. Now if he sees the Bengali language, he would become pretty sure that train is connected in some or the other way to the state of WEST BENGAL.( if he is not from local rail zone).
I believe Bengali language should be there.