fixed #4062, fixed akhoury/nodebb-plugin-emailer-mandrill#19

src/plugins.js

@@ -31,6 +31,7 @@ var fs = require('fs'),
 	Plugins.lessFiles = [];
 	Plugins.clientScripts = [];
 	Plugins.customLanguages = [];
+	Plugins.customLanguageFallbacks = {};
 	Plugins.libraryPaths = [];
 	Plugins.versionWarning = [];
 
@@ -393,12 +394,10 @@ var fs = require('fs'),
 			translator.addTranslation(language, filename, lang.file);
 		});
 
-		var fallbackPath;
 		for(var resource in Plugins.customLanguageFallbacks) {
-			fallbackPath = Plugins.customLanguageFallbacks[resource];
 			params.router.get('/language/:lang/' + resource + '.json', function(req, res, next) {
-				winston.verbose('[translator] No resource file found for ' + req.params.lang + '/' + resource + ', using provided fallback language file');
+				winston.verbose('[translator] No resource file found for ' + req.params.lang + '/' + path.basename(req.path, '.json') + ', using provided fallback language file');
-				res.sendFile(fallbackPath);
+				res.sendFile(Plugins.customLanguageFallbacks[path.basename(req.path, '.json')]);
 			});
 		}
 

src/plugins/load.js

@@ -6,6 +6,7 @@ var fs = require('fs'),
 	async = require('async'),
 	winston = require('winston'),
 	nconf = require('nconf'),
+	_ = require('underscore'),
 	file = require('../file'),
 	utils = require('../../public/src/utils');
 
@@ -184,7 +185,7 @@ module.exports = function(Plugins) {
 						route: pathToLang.replace(pathToFolder, '')
 					});
 
-					if (pluginData.defaultLang) {
+					if (pluginData.defaultLang && pathToLang.endsWith(pluginData.defaultLang + '/' + path.basename(pathToLang))) {
 						fallbackMap[path.basename(pathToLang, '.json')] = path.join(pathToFolder, pluginData.defaultLang, path.basename(pathToLang));
 					}
 
@@ -196,7 +197,7 @@ module.exports = function(Plugins) {
 				}
 
 				Plugins.customLanguages = Plugins.customLanguages.concat(arr);
-				Plugins.customLanguageFallbacks = fallbackMap;
+				_.extendOwn(Plugins.customLanguageFallbacks, fallbackMap);
 
 				callback();
 			});