The novel doesn't specify that (not learning the sign language). While it's true that certain scenes have been modified for a better experience, the main plot remains unchanged.
Don't do it now. Here is my plan for more fun, start watching ep 1 &2 on 29 nov Saturday two hours earlier to ep 3 and 30 nov Sunday ep1,ep2&ep3 three hours earlier to ep 4. So continue this trend untill 12 th episode π
I get it π
three hours earlier to ep 4. So continue this trend untill 12 th episode π