closes #4432

public/src/app.js

@@ -326,7 +326,10 @@ app.cacheBuster = null;
 			return;
 		}
 		require(['translator'], function(translator) {
-			title = config.titleLayout.replace(/{/g, '{').replace(/}/g, '}').replace('{pageTitle}', title).replace('{browserTitle}', config.browserTitle);
+			title = config.titleLayout.replace(/{/g, '{').replace(/}/g, '}')
+				.replace('{pageTitle}', function() { return title; })
+				.replace('{browserTitle}', function() { return config.browserTitle; });
+
 			translator.translate(title, function(translated) {
 				titleObj.titles[0] = translated;
 				app.alternatingTitle('');

public/src/modules/translator.js

@@ -213,13 +213,14 @@
 
 	function insertLanguage(text, key, value, variables) {
 		if (value) {
-			var variable;
-			for (var i = 1, ii = variables.length; i < ii; i++) {
-				variable = S(variables[i]).chompRight(']]').collapseWhitespace().decodeHTMLEntities().escapeHTML().s;
-				value = value.replace('%' + i, variable);
+			variables.forEach(function(variable, index) {
+				if (index > 0) {
+					variable = S(variable).chompRight(']]').collapseWhitespace().decodeHTMLEntities().escapeHTML().s;
+					value = value.replace('%' + index, function() { return variable; });
 				}
+			});
 
-			text = text.replace(key, value);
+			text = text.replace(key, function() { return value; });
 		} else {
 			var string = key.split(':');
 			text = text.replace(key, string[string.length-1].replace(regexes.replace, ''));

src/controllers/helpers.js

@@ -105,7 +105,11 @@ helpers.buildTitle = function(pageTitle) {
 
 	var browserTitle = validator.escape(meta.config.browserTitle || meta.config.title || 'NodeBB');
 	pageTitle = pageTitle || '';
-	var title = titleLayout.replace('{pageTitle}', pageTitle).replace('{browserTitle}', browserTitle);
+	var title = titleLayout.replace('{pageTitle}', function() {
+		return pageTitle;
+	}).replace('{browserTitle}', function() {
+		return browserTitle;
+	});
 	return title;
 };