You just described Newspeak (Nineteen Eighty-Four novel):
Newspeak, which is a controlled language of simplified grammar and limited vocabulary designed to limit a person's ability for critical thinking. The Newspeak language thus limits the person's ability to articulate and communicate abstract concepts, such as personal identity, self-expression, and free will,[1][2] which are thoughtcrimes, acts of personal independence that contradict the ideological orthodoxy of Ingsoc collectivism.[3][4]
I found this and this maybe it can help.