Sir, decision is very much welcome,
I think(my opinion, for this issue):-
as there are 3 columns:- English(Remain Same), Hindi(Remain Same) and Regional Language.
for Regional Language,
1) There should be regional languages defined...
more... for each region/state on IRI.
In Regional Language field:-
2) Except Hindi and English, every language is accepted, which is defined in Point 1.
3) if both, source and destination stations are not from Hindi lang. region(eg. south and North-east Indian states including Gujrat,Goa and Maharashtra) then there should be format as follow for Regional Language:-
"SOURCE STATE LANGUAGE / DESTINATION STATE LANGUAGE"
4) if regional language is Hindi/English then Regional Language will be blank.
(This concept should apply for both, Train names and station names)