diff --git a/flow/weex.js b/flow/weex.js
index 2834313f..6d21a579 100644
--- a/flow/weex.js
+++ b/flow/weex.js
@@ -28,7 +28,7 @@ declare type WeexEnvironment = {
   appName: string; // mobile app name or browser name
   appVersion: string;
 
-  // informations of current running device
+  // information about current running device
   deviceModel: string; // phone device model
   deviceWidth: number;
   deviceHeight: number;
diff --git a/src/compiler/parser/index.js b/src/compiler/parser/index.js
index 4debf62a..342d04ff 100644
--- a/src/compiler/parser/index.js
+++ b/src/compiler/parser/index.js
@@ -380,7 +380,7 @@ export function parse (
       }
     },
     comment (text: string, start, end) {
-      // adding anyting as a sibling to the root node is forbidden
+      // adding anything as a sibling to the root node is forbidden
       // comments should still be allowed, but ignored
       if (currentParent) {
         const child: ASTText = {
diff --git a/test/unit/features/directives/on.spec.js b/test/unit/features/directives/on.spec.js
index b7801a82..5e755a34 100644
--- a/test/unit/features/directives/on.spec.js
+++ b/test/unit/features/directives/on.spec.js
@@ -280,7 +280,7 @@ describe('Directive v-on', () => {
     expect(spy.calls.count()).toBe(1)
   })
 
-  it('should support system modifers with exact', () => {
+  it('should support system modifiers with exact', () => {
     vm = new Vue({
       el,
       template: `
@@ -405,7 +405,7 @@ describe('Directive v-on', () => {
     Vue.config.keyCodes = Object.create(null)
   })
 
-  it('should override build-in keyCode', () => {
+  it('should override built-in keyCode', () => {
     Vue.config.keyCodes.up = [1, 87]
     vm = new Vue({
       el,
@@ -420,7 +420,7 @@ describe('Directive v-on', () => {
       e.keyCode = 1
     })
     expect(spy).toHaveBeenCalledTimes(2)
-    // should not affect build-in down keycode
+    // should not affect built-in down keycode
     triggerEvent(vm.$el, 'keyup', e => {
       e.keyCode = 40
     })
diff --git a/types/umd.d.ts b/types/umd.d.ts
index 618d484e..d1dc8d15 100644
--- a/types/umd.d.ts
+++ b/types/umd.d.ts
@@ -7,7 +7,7 @@ import {
   PropsDefinition
 } from "./options";
 
-// Expose some types for backword compatibility...
+// Expose some types for backward compatibility...
 declare namespace Vue {
   // vue.d.ts
   export type CreateElement = V.CreateElement;