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Terminology swap
> Is Ledger’s >!~~password~~!< [BIP39 passphrase] compatible with Trezor’s hidden wallet >!~~password~~!< [BIP39 passphrase]?
Yes, Ledger, Trezor, and Coldcard all use the same BIP39 standard, so they translate from one to the other with the following exceptions
1. Ledger supported LONGER bip39-passphrases than Trezor. So you need to ensure that your Ledger bip39-passphrase can fit into 50 bytes (depending on language encoding)
2. BIP39-passphrases are only applicable to coins that support BIP39. XMR (monero) is not BIP39 compliant, as such, each wallet uses unique math to derive XMR. Trezor’s math is published in the SLIP-10 specification.