Bitcoin Improvement Proposal (BIP 39)
Your 12-24 recovery seed phrase or wallet backup most likely comes from the Bitcoin Improvement Proposal: 39 (BIP 39). BIP 39 is the use of a mnemonic phrase -- a group of easy to remember words -- to serve as your back up recovery in the event your wallet becomes compromised.
These words are pulled from a specific list of 2048 words. This wordlist is also in multiple languages: