Font displaying is very ugly; non-smooth, hard to read.

[n2i]

Hi,

The Vietnamese version of this book has a problem with the font displaying, which is non-smooth, very eyes-hurt display.

The same problem could be find on other languages version of the book, such as Hungarian but not Thai, Español. That's weird!

What about replace the "Source San Pro" with the "Open Sans" font-family?

Please fix this. Thank you!

Chrome - Desktop

Chrome - Mobile