the days of "chinese language only" boxes are long over, u cannot find them unless u buy in china.

all boxes sold internationally now are in eng.

u may want to specify a bit more:

.. netflix - must the box be able to do netflix in hd/4k? yr tv cannot do?
this is impt becos this netflix hd/4k feature is quite rare in boxes - either u pay a lot for it or give up other features.

.. plex... how r u sing it, what file types, setup u already have?

if u describe better in detail, u may get better response, hopefully not waste $$.