Interested in Language
"It is not so much the language as the cultural background that makes the book difficult to understand."
Can I change "as" to "but"?
But on the second thought, I feel if I did, the meaning of the sentence maybe will be changed. Although I don't know how.
It is better with as. If you changed it to but, you would be reducing the language element further IMO, but it doesn't read well.