Due to the many references made to it in the text, I suspect you have mainly or only programmed in Java? It is greatly advantageous to have used many languages

Due to the many references made to it in the text, I suspect you have mainly or only programmed in Java? It is greatly advantageous to have used many languages (especially 'in production') when coming to design your own, not least as you will then be aware of and can reference precedents for your language features. For example the @ flags on functions are essentially shell script flags.