How does achebe create a "new english" with his use of language in "civil peace"?

He fills his English with Igbo language patterns and rhythm.
He creates a completely new language, which he calls "new English." He writes in Igbo and instills his writing with British proverbs and idioms.

Came the day of the windfall when after five days of endless scuffles in queues and counter-queues in the sun outside the Treasury he had twenty pounds counted into his palms as ex gratia award for the rebel money he had turned in. It was like Christmas for him and for many others like him when the payments began. They called it (since few could manage its proper official name) egg rasher.