Moved before block up a level higher this way we're on the same level as the after block.

test/language.test.js

@@ -6,17 +6,17 @@ var chai      = require('chai')
 chai.Assertion.includeStack = true
 
 describe(Support.getTestDialectTeaser("Language Util"), function() {
-  after(function(done) {
-    this.sequelize.options.language = 'en'
+  before(function(done) {
+    this.sequelize.options.language = 'es'
     done()
   })
 
-  describe("Plural", function(){
-    before(function(done) {
-      this.sequelize.options.language = 'es'
+  after(function(done) {
+    this.sequelize.options.language = 'en'
     done()
   })
 
+  describe("Plural", function(){
     it("should rename tables to their plural form...", function(done){
       var self = this
         , table = self.sequelize.define('arbol', {name: Sequelize.STRING})