Is English the only language that is butchered by the people speaking it?

There is so much slang and terrible butchering of the English language when spoken, and written, in the U.S. Does this exist in other languages such as Spanish or German, by the people who speak it all the time?

do you use formal language writing a blog?

i have to write a blog and i’m wondering if i have to use formal language or slang and abbreviations