Bip39 test vectors https://www.divephotoguide.com/user/arwyneglmp/ While it utilizes BIP32 technique you'll be able to continue to import BIP39 seeds into Electrum wallet. Also in addition to BIp32 There is certainly BIP44 version which some wallet use for the generation of seeds. Some wallets can import several seed phrases plus some only https://bookmarkpressure.com/story19798691/bip39-s-entropy-to-mnemonic-bip39-compatible-wallet-options-https-x-com-tundra838554