Bip39 Seed Phrase. Whilst there are BIP39 wordlists in languages apart from English, it's strongly not recommended to make use of non-English words for wallet backups. It might make restoring the wallet challenging or difficult. No, there is no specialized limit into the duration of one's passphrase. Having said that, https://extrabookmarking.com/story18775437/bip39-passphrase-https-linktr-ee-bip39-not-known-details-about-bip39-list