Bip39 Dictionary. Though you can find BIP39 wordlists in languages other than English, it's strongly not proposed to implement non-English words for wallet backups. It'd make restoring the wallet tough or not possible. No, there's no specialized limit for the length of one's passphrase. Nevertheless, to the sake of memorability https://sparxsocial.com/story8939520/bip39-passphrase-https-linktr-ee-bip39-the-single-best-strategy-to-use-for-bip39-wallets