Bip39 test vectors https://pixabay.com/users/51089543/ Regardless that it takes advantage of BIP32 technique you'll be able to continue to import BIP39 seeds into Electrum wallet. Also in addition to BIp32 there is BIP44 Edition which some wallet use for that generation of seeds. BIP32 and BIP44 operate alongside one another so https://www.bitsdujour.com/profiles/wWbptt