Word + Bib. Though it uses BIP32 system you can nonetheless import BIP39 seeds into Electrum wallet. Also aside from BIp32 There may be BIP44 version which some wallet use for the technology of seeds. These words are pulled from a particular list of 2048 words. They are available below https://bookmark-dofollow.com/story22106661/bip39-gpu-getting-my-word-list-bip39-to-work