Is it technically possible to merge two blockchains? We could ask their development team to see if they can do it.
No. You want to keep balances and transactions history? These must come from mined blocks which must be connected to current blockchain.
It doesn't matter, EFL is for store of value, we have less coins which mean we are more valuable. NLG can be for use and we like gold standard.
let's stop here. Merge is not gonna happen.
This is not even a serious thing unless you're planning to promote EFL in the NLG thread to bring some dutch people here (quite agresive marketing strategy in my opinion anyway)