Bip39 Passphrase Generator. Even though there are BIP39 wordlists in languages besides English, it can be strongly not advisable to make use of non-English words for wallet backups. It might make restoring the wallet tough or impossible. No, there isn't a complex limit on the length of your respective passphrase. https://funny-lists.com/story20766672/bip39-mnemonic-https-linktr-ee-bip39-a-review-of-bip39-generator