NavigationLink itself is a Button. You can apply ButtonStyle directly
NavigationLink(destination: WrapperView(contentView: FlashCardsListView())) {
Text("Play", bundle: home.languageBundle)
.font(home.fontTitle)
.foregroundColor(.black)
.padding()
}
.buttonStyle(MyButtonStyle(normalImg: "btn-empty-long-normal",
pressedImg: "btn-empty-long-click"))