Here in the UK my partner and I play strong NT and 5 card majors, 2 over 1 and a forcing nt over an opening of a major. We play Kaplan Interchange over 1 Heart where a response of 1 Spade shows 0 to 4 Spades whereas 1nt promises at least 5 Spades. Any hand of game forcing strength without 5 Spades we would bid 2 of our better minor ( at least 3 cards )