What is "renglish"

Renglish is a system of writing English in the Cyrillic script. It is based mainly on the Russian alphabet with two letters borrowed from Serbian and one letter borrowed from Belarusian. It was created by Slacknet Communications with assistance from many Russians along with a Serbian. This system is rather uncommon, with no census of those who use this system. Estimates average around 15,000 to 50,000 people worldwide, most of them likely Slavic immigrants from Slavic countries who use Cyrillic as the official script for their languages such as Russia, Bulgaria, and Ukraine.