For a GUI-focused languages, we have C# and Java. For a fully dynamic scripting language, look no further than Python. Function inheritance? We have decorator

For a GUI-focused languages, we have C# and Java. For a fully dynamic scripting language, look no further than Python. Function inheritance? We have decorators in Python already, and most functional languages support seamless function composition. Take your pick between Haskell, Lisp, Scala and even Rust. Designing a new languages needs to have a pragmatic purpose and sometimes, valid ideology.