Extracted strings and fixes on localization support

Language chooser in the UI

shared/langs.js

@@ -0,0 +1,66 @@
+'use strict';
+
+function convertToFake(dict) {
+    function convertValueToFakeLang(str) {
+        let from = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()-_=+\\|`~[{]};:'\",<.>/?";
+        let to = "ɐqɔpǝɟƃɥıɾʞʅɯuodbɹsʇnʌʍxʎz∀ԐↃᗡƎℲ⅁HIſӼ⅂WNOԀÒᴚS⊥∩ɅＭX⅄Z0123456789¡@#$%ᵥ⅋⁎()-_=+\\|,~[{]};:,„´<.>/¿";
+
+        return str.replace(/(\{\{[^\}]+\}\}|%s)/g, '\x00\x04$1\x00').split('\x00').map(c => {
+            if (c.charAt(0) === '\x04') {
+                return c;
+            }
+            let r = '';
+            for (let i = 0, len = c.length; i < len; i++) {
+                let pos = from.indexOf(c.charAt(i));
+                if (pos < 0) {
+                    r += c.charAt(i);
+                } else {
+                    r += to.charAt(pos);
+                }
+            }
+            return r;
+        }).join('\x00').replace(/[\x00\x04]/g, '');
+    }
+
+    function _convertToFake(dict, fakeDict) {
+        for (const key in dict) {
+            const val = dict[key];
+
+            if (typeof val === 'string') {
+                fakeDict[key] = convertValueToFakeLang(val);
+            } else {
+                fakeDict[key] = _convertToFake(val, {});
+            }
+        }
+
+        return fakeDict;
+    }
+
+    return _convertToFake(dict, {});
+}
+
+const langCodes = {
+    en_US: {
+        getShortLabel: t => t('EN'),
+        getLabel: t => t('English'),
+        shortCode: 'en',
+        longCode: 'en_US'
+    },
+    es: {
+        getShortLabel: t => t('ES'),
+        getLabel: t => t('Spanish'),
+        shortCode: 'es',
+        longCode: 'es'
+    },
+    fake: {
+        getShortLabel: t => t('FAKE'),
+        getLabel: t => t('Fake'),
+        shortCode: 'fake',
+        longCode: 'fake'
+    }
+}
+
+langCodes.en = langCodes.en_US;
+
+module.exports.convertToFake = convertToFake;
+module.exports.langCodes = langCodes;