API doc is faulty in chinese/korean

A DESCRIPTION OF THE REQUEST :
API Documentation Bug:

The javafx collections API doc is a mixture of English and Asian text, i am not sure about which language. This occurs on many pages, one example is:

http://docs.oracle.com/javase/jp/8/javafx/api/index.html?javafx/collections/ObservableList.html

My computer is set to English, with its locale set to Germany.

JUSTIFICATION :
A comprehensible API doc is vital for the use of JavaFX - in my case in teaching

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
All English Text
ACTUAL -
Mixture, even with Latin and Asian letter set.

---------- BEGIN SOURCE ----------
http://docs.oracle.com/javase/jp/8/javafx/api/index.html?javafx/collections/ObservableList.html
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Learning Chinese?