English Text?

I have always thought that there are a lot of letters everywhere so I would say the polluted and overflowing characters around me may contaminate my brain. Now I got suprised as I am to find what kind of English text I usually see/read.

▶ textbook; who protects! I am junior. lol
▶ commercial sign; looks like hell.
▶ interface(menu) phrase of cell phone;
...

of course, there are much more things than them.

What matters is not whether it's written in Korean or English. However, I should think about it seriously. Can reading/seeing a text be called helpful way of learning language?