Fix typos

en/11/08.md

@@ -117,7 +117,7 @@ Yes, right now our logic is pretty straightforward, but this might not always be
 
 -   second, we also have to check if Bob is allowed to run `transferFrom`.
 
-Moreover, in the future, you might want to add other functionalities that would require different tests. We believe it is best to put a scaleable structure in place from the very beginning😉. It makes understanding your code much easier for outsiders, or for yourself if you've spent time concentrating on something else for a little while.
+Moreover, in the future, you might want to add other functionalities that would require different tests. We believe it is best to put a scalable structure in place from the very beginning😉. It makes understanding your code much easier for outsiders, or for yourself if you've spent time concentrating on something else for a little while.
 
 >Note: If you end up in a position where you're working with other coders, you'll find they're more likely to follow whichever conventions you've laid down in your initial code. Being able to collaborate effectively is one of the key skills you'll need if you ever want to work on big, successful projects. Getting good habits that help you do this as early on as possible will make your life as a coder easier and more successful.
 

en/11/13.md

@@ -249,7 +249,7 @@ Enough talking. Let's put `Chai`'s powers to some good use!
 
 1.  Import `expect` into our project.
 
-2.  Continuing the above example with `zombieName`, we can use `expect` to test for a succesfull transaction as follows:
+2.  Continuing the above example with `zombieName`, we can use `expect` to test for a successful transaction as follows:
 
 ```javascript
 expect(result.receipt.status).to.equal(true);
@@ -260,4 +260,4 @@ And we can check if Alice owns a zombie like this:
 expect(zombieOwner).to.equal(alice);
 ```
 
-1.  Replace all occurences of `assert.equal` with `expect`. We've left a bunch of comments in the code to make them easy to find.
+1.  Replace all occurrences of `assert.equal` with `expect`. We've left a bunch of comments in the code to make them easy to find.