Outside of the Single written official version of Cornish for public use there are a number of spelling systems that are used

Kernewek Kemmyn or common Cornish - The system the vast majority of learners use, based on a revised version of Middle Cornish the period of the language which was most "Celtic".

Curnoack Nowedga - Modern Cornish, based on the version of Cornish last spoken in the far West of the Duchy.

Unified Cornish or Unified Revised Cornish - The original revivalists such as R Morton Nance comiled this common spelling system based on Middle Cornish the period of the language which was most "Celtic".

The Cornish language is growing in popularity and a news site in Kernewek can be found here.