@bbbourq A priori constructed language is an artificial language created for a specific purpose, without reference to existing languages. To create a successful a priori language, you must first decide on a purpose for the language, such as scientific communication or international communication. Then you will need to design a set of rules, known as a grammar, to define the structure of the language – this includes the alphabet, vocabulary, syntax, and phonology. Once you have established the basics, you should then develop and test the language by creating sample sentences and conversations to make sure it works. Finally, once the language is complete, it should be shared with others so they can use it.