Hello,
According to IFRS it is not per currency that should present the exchange rate differences, it is per balance sheet account (main account)
So putting it per currency would not help.
We need to be able to specify for some main account other unrealized/realized accounts than the once set up in the ledger. Thos in the ledger can be used for AR and AP and normal bank accounts.
But according to IFRS, some types of assets, and the differences that fluctuations in exhange rate causes, should be presneted in the P&L in special accounts.