feat(docs): add custom labels to the readme

README.md

@@ -14,6 +14,7 @@ Check out the [examples](https://akiokio.github.io/ReactSignupLoginComponent/) t
 - Callbacks for every action
 - 100% test coverage
 - Drop-in component
+- Custom labels for any text: replace any text to your own nice for customization or internationalization
 
 ## How to use it
 
@@ -143,6 +144,21 @@ You can overhide the component style passing an object to the styles prop. Here'
 />
 ```
 
+### Custom labels
+Here's the list of possible custom labels you can use:
+```
+  usernameCustomLabel="Anything you want"
+  passwordCustomLabel="Anything you want"
+  passwordConfirmationCustomLabel="Anything you want"
+  recoverPasswordCustomLabel="Anything you want"
+  signupCustomLabel="Anything you want"
+  submitLoginCustomLabel="Anything you want"
+  goToLoginCustomLabel="Anything you want"
+  submitSignupCustomLabel="Anything you want"
+  goToSignupCustomLabel="Anything you want"
+  submitRecoverPasswordCustomLabel="Anything you want"
+```
+
 ## Tests
 We have a 100% percent test coverage, to run the tests locally:
 ```js