diff --git a/README.xlsx b/README.xlsx
index 5b04ba4..9cacbee 100644
Binary files a/README.xlsx and b/README.xlsx differ
diff --git a/index.js b/index.js
index 601f23f..2019637 100644
--- a/index.js
+++ b/index.js
@@ -60,11 +60,9 @@ module.exports = {
 
     //// for bip39. 注意，bip39对当前defaultWordlist之外其他语言的合法 mnemonic 也返回 false，这一点不如 bitcore-mnemonic. 所以不能直接 bip39.validateMnemonic(secword)
     if (typeof secword==='string' && 12===secword.split(/ +/).length) {
-      try {
-        bip39.mnemonicToEntropy(secword)
-        return true
-      }catch(exception){
-        return false
+      for (let lang of Object.keys(bip39.wordlists)) {
+        if (bip39.validateMnemonic(secword))
+          return true
       }
     }
     return false