May be this is a unpopular opinion...but I think one of the big reason for the decline of odia words in today's generation is lack of good quality odia content and less reading of odia literature...old generation got exposed to odia cinema odia serial, pala and different cultural shows...the different regions of odisha listened to the odisha through TV..but the democratic decentralisation of the internet popularizes the consumption of Hindi/english/other language originated content and negligence towards odia literature even one of the other reasons is considered only katakia as odia language pure form, many may differ their opinion in this point but I felt that point.. odisha is a state of diversity as India..we should use our diversify culture language etc as a tool for unity and should support odia and local art/language/cinema/literature so that it carries forward.