The German title of his book is "Ermüdungsgesellschaft" which literally translates to "fatigue society". Han lives and works in Berlin, as a professor of philosophy I am not sure if he writes in German or English tho.
"Ermüdungsgesellschaft" is indeed the original title, it was written in German and published in 2010. The translated English version came out in 2015.
Amazon's description of "The Burnout Society" says: "His work is presented here in English for the first time." Interestingly, Amazon doesn't say anything about the book being a translation, but goodreads.com names the translator.
In Portugal is "Sociedade do Cansaço" which translates to "fatigue society"
The book is called „Müdigkeitsgesellschaft“
Ah yeah thanks for the correction, I am not sure why my memory faild me there.