Shaduwish is the official languages of Shaduwenian. Other language such as English, French, Tagalog and Dutch are widely spoken through out the Empire. Also due to a certain amount of immigrant from Sadjedi and Mentaçti Union their language are widely spoken mostly in the annexed province. Azraxylish is spoken by the majority of people in the crown colony of Azraxyl.

More than 99% of the population speaks Shaduwish as their first language. It is an agglutinative language distinguished by a system of honorifics reflecting the hierarchical nature of Shaduwenian society, with verb forms and particular vocabulary which indicate the relative status of speaker and listener.

The writing system uses the Latin alphabet and Arabic numerals