Allow choosing language for mnemonic seed

background.html

@@ -574,6 +574,8 @@
 
           <input class='form-control' type='text' id='mnemonic' placeholder='Mnemonic' autocomplete='off' spellcheck='false'>
           
+          <select id='mnemonic-language'></select>
+
           <div class='clearfix'>
             <a class='button' id='register-mnemonic'>Register using mnenomic</a>
           </div>

js/views/standalone_registration_view.js

@@ -24,6 +24,14 @@
         el: this.$('#phone-number-input'),
       });
       this.$('#error').hide();
+
+      window.mnemonic.get_languages().forEach(language => {
+        this.$('#mnemonic-language').append($('<option>', {
+          value: language,
+          text: language.charAt(0).toUpperCase() + language.slice(1),
+        }));
+      });
+
     },
     events: {
       'validation input.number': 'onValidation',
@@ -36,7 +44,7 @@
     },
     register() {
       this.accountManager
-        .registerSingleDevice(this.$('#mnemonic').val())
+        .registerSingleDevice(this.$('#mnemonic').val(), this.$('#mnemonic-language').val())
         .then(() => {
           this.$el.trigger('openInbox');
         })

libloki/mnemonic.js

@@ -5,6 +5,7 @@ module.exports = {
   mn_encode,
   mn_decode,
   sc_reduce32,
+  get_languages,
 };
 class MnemonicError extends Error {}
 
@@ -127,14 +128,14 @@ function mn_decode(str, wordset_name) {
 }
 
 var mn_words = {
-  'electrum': {
-    prefix_len: 0,
-    words: require('../mnemonic_languages/electrum'),
-  },
   'english': {
     prefix_len: 3,
     words: require('../mnemonic_languages/english'),
   },
+  'electrum': {
+    prefix_len: 0,
+    words: require('../mnemonic_languages/electrum'),
+  },
   'spanish': {
     prefix_len: 4,
     words: require('../mnemonic_languages/spanish'),
@@ -149,6 +150,10 @@ var mn_words = {
   }
 };
 
+function get_languages() {
+  return Object.keys(mn_words);
+}
+
 for (var i in mn_words) {
   if (mn_words.hasOwnProperty(i)) {
     if (mn_words[i].prefix_len === 0) {

libtextsecure/account_manager.js

@@ -44,7 +44,7 @@
     requestSMSVerification(number) {
       return this.server.requestVerificationSMS(number);
     },
-    registerSingleDevice(mnemonic) {
+    registerSingleDevice(mnemonic, mnemonicLanguage) {
       const createAccount = this.createAccount.bind(this);
       const clearSessionsAndPreKeys = this.clearSessionsAndPreKeys.bind(this);
       const generateKeys = this.generateKeys.bind(this, 0);
@@ -53,7 +53,7 @@
       let generateKeypair;
       if (mnemonic) {
         generateKeypair = () => {
-          const seedHex = window.mnemonic.mn_decode(mnemonic);
+          const seedHex = window.mnemonic.mn_decode(mnemonic, mnemonicLanguage);
           const privKeyHex = window.mnemonic.sc_reduce32(seedHex);
           const privKey = dcodeIO.ByteBuffer.wrap(privKeyHex, 'hex').toArrayBuffer();
           return libsignal.Curve.async.createKeyPair(privKey);