Mistralian norm
The Mistralian norm is a linguistic norm for the Occitan language. It was first used in a published work by Joseph Roumanille in 1853, and then by Frédéric Mistral in 1854. Its aim is to make Provençal Occitan orthography more logical, relying on a mix of traditional spelling and French spelling conventions. The Tresor dòu Felibrige, published by the Félibrige in 1878, was written entirely in the Mistralian norm. Comparison 

Some features include:
 Using the letter o to represent a final  or , where Classical Occitan uses a. For example,  becomes chato in the text above. Using ou to represent , where Classical Occitan uses o. For example, escolan becomes escoulan in the text above. Using gn to represent , where Classical Occitan uses nh. For example, montanha becomes mountagno. Using o to represent , where Classical Occitan uses ò. For example, pòrta becomes porto. Encoding
The IETF language subtag for the norm is . References

External links 
 Lou Tresor dòu Felibrige, tomes I and II, via lexilogos.com. Occitan language
1853 introductions
French inventions
Orthography reform
Indo-European Latin-script orthographies
Frédéric Mistral