How to buy global etfs like etf related to japan, russia , brazil etc,?

Etfs related to global indices

Currently NSE has ETF’s tracking Hangseng and Nasdaq, so this can be bought easily by logging into Kite or any other trading platform. Other indices, you would need to open an international broking account and transfer money out to be able to purchase.

Are the stt and other charges for these global etfs (like Motilal Oswal MOSt NASDAQ 100) same as any other etfs like SBI - ETF Nifty 50? Taxation also same as other etfs? (I meant are these considered foreign income or something?)