Wrong response for russian translations

Great script.

One thing I have noticed is that if you try to to translate some let say english text to russian, the response comes broken, like this :

{ "data": { "translations": [ { "translatedText": "??????????, ????????? ????. ???? ???????? ????????? ???????, ??? ????? ???????? ?? ????? ??? ?????????." } ] } }

Looking at the class, it already has utf8_decode($JsonGooTrnsltr);, so, no idea why it interprets it wrongly.