one of the themes of 1984 is that language is a powerful tool for determining how people view the world. how is this theme illustrated by the use of newsspeak?

Language enables people to express themselves. That means people can develop separate identities. If you cut language (words) out, this leaves little opportunity to express individual feelings. Newsspeak is designed top chop the English language so that people will be unable to express individual emotions hence they become easier to assimilate into the Party.

You'll find a detailed article about newsspeak at the website below;