Bip39 Compatible Wallet. Even though there are actually BIP39 wordlists in languages besides English, it really is strongly not recommended to implement non-English words for wallet backups. It would make restoring the wallet difficult or not possible. No, there is not any technical limit into the duration of your passphrase. https://bookmarkworm.com/story18643091/bip39-word-list-pdf-https-linktr-ee-bip39-the-fact-about-bip-39-that-no-one-is-suggesting