Incompatible with Entity translation?

Dear developers! First of all, thanks for the awesome module!

I have experienced a bug described above in one of my projects (Drupal 7.53 + CKEditor 7.x-1.17). I have managed to catch the situation when it appears, that's why I'm submitting an issue. In my case the bug showed when I added Entity translation to my website (I followed these instructions).

The error message:

Server response came not in JSON format:
{"status":true,"data":"\u003Cp\u003E\u003Ca href=\u0022\/sites\/default\/files\/styles\/content-image-1200\/public\/inline\/images\/2016\/12\/11\/soul_of_the_mountains_dsc04918_4_2.jpg?itok=UtpThHAH\u0022 target=\u0022_blank\u0022 class=\u0022colorbox\u0022\u003E\u003Cimg src=\u0022\/sites\/default\/files\/styles\/content-image-790\/public\/inline\/images\/2016\/12\/11\/soul_of_the_mountains_dsc04918_4_2.jpg?itok=6JYekObF\u0022 alt=\u0022\u0022 \/\u003E\u003C\/a\u003E\u003C\/p\u003E"}

It would really be great to use the module on multilingual websites.