It isn't essential to know all the small print of BIP39 so that you can use copyright - however, you would definitely gain from understanding a little about it. This informative article clarifies BIP39, the standard that defines how seed phrases are made, and summarizes how BIP32 and BIP44 standards https://bookmarkuse.com/story18974273/little-known-facts-about-bip39-seed-phrase-list