Bip39 Vs A single illustration of manually building entropy might be flipping a coin. But if an attacker gives you a coin that's weighted slightly in favor of heads, your First source of entropy should have been corrupted. This tends to create a bundle that only includes the chinese_simplified wordlist, https://crossbookmark.com/story18563681/bip39-all-words-the-best-side-of-seed-phrase-generator