Fixed typo, and added note about languages.

README.md

@@ -362,7 +362,7 @@ If you have more time (I want this book):
 
 **You need to choose a language for the interview (see above).** Here are my recommendations by language. I don't have resources for all languages. I welcome additions.
 
-If you read though one of these, you should have all the data structures and algoritms knowledge you'll need to start doing coding problems. 
+If you read though one of these, you should have all the data structures and algorithms knowledge you'll need to start doing coding problems. 
 **You can skip all the video lectures in this project**, unless you'd like a review.
 
 [Additional language-specific resources here.](programming-language-resources.md)
@@ -514,6 +514,8 @@ Each day I take one subject from the list below, watch videos about that subject
 - and write tests to ensure I'm doing it right, sometimes just using simple assert() statements
 - You may do Java or something else, this is just my thing.
 
+You don't need all these. You need only [one language for the interview]((#pick-one-language-for-the-interview)).
+
 Why code in all of these?
 - Practice, practice, practice, until I'm sick of it, and can do it with no problem (some have many edge cases and bookkeeping details to remember)
 - Work within the raw constraints (allocating/freeing memory without help of garbage collection (except Python))