Can I use any language for BIP39?

BIP39 supports multiple languages including English, Japanese, Chinese (Traditional/Simplified), French, Italian, Korean, Spanish, and Czech. Each language has a standardized 2048-word list.

Python (using mnemonic library):

from mnemonic import Mnemonic
import hashlib
import hmac

def generate_bip39_mnemonic(strength=128):
    # strength can be 128, 160, 192, 224, or 256 bits
    mnemo = Mnemonic("english")
    mnemonic = mnemo.generate(strength=strength)
    return mnemonic

def mnemonic_to_seed(mnemonic, passphrase=""):
    mnemo = Mnemonic("english")
    seed = mnemo.to_seed(mnemonic, passphrase)
    return seed.hex()

def validate_mnemonic(mnemonic):
    mnemo = Mnemonic("english")
    return mnemo.check(mnemonic)

# Example usage
mnemonic = generate_bip39_mnemonic(128)  # 12 words
print(f"Mnemonic: {mnemonic}")
print(f"Valid: {validate_mnemonic(mnemonic)}")
seed = mnemonic_to_seed(mnemonic)
print(f"Seed: {seed[:64]}...")
            

JavaScript (using bip39 library):

const bip39 = require('bip39');

function generateMnemonic(strength = 128) {
    // Generate mnemonic with specified entropy strength
    const mnemonic = bip39.generateMnemonic(strength);
    return mnemonic;
}

function mnemonicToSeed(mnemonic, password = '') {
    // Convert mnemonic to seed
    const seed = bip39.mnemonicToSeedSync(mnemonic, password);
    return seed.toString('hex');
}

function validateMnemonic(mnemonic) {
    // Validate BIP39 mnemonic
    return bip39.validateMnemonic(mnemonic);
}

// Example usage
const mnemonic = generateMnemonic(256); // 24 words
console.log('Mnemonic:', mnemonic);
console.log('Valid:', validateMnemonic(mnemonic));
const seed = mnemonicToSeed(mnemonic);
console.log('Seed:', seed.substring(0, 64) + '...');