Bip39 Seed. Even though there are BIP39 wordlists in languages other than English, it is actually strongly not encouraged to implement non-English words for wallet backups. It'd make restoring the wallet challenging or impossible. No, there isn't a complex limit into the length within your passphrase. Even so, for the https://mnobookmarks.com/story18706456/bip39-mnemonic-https-linktr-ee-bip39-top-guidelines-of-bip39-passphrase