Swift

vs

Lua

A general purpose, object-oriented programming language that adds Smalltalk-style messaging to the C programming language. Objective-C was specifically designed for the Apple ecosystem and their respective application programming interfaces, Cocoa and Cocoa Touch for building applications for macOS and iOS. Since 2014 the Apple ecosystem rely on their new programming language Swift.

At Google I/O 2017, Kotlin was announced as to official development and programming language for Android. As it became the third language to be fully supported by the platform with Java and C++. However, Kotlin can also be used cross-paltform for native, server-side and web development as well as for data science projects. The language is statically typed and general-purpose, and is designed from the bottom up to increase developer happiness. 

Raku is a programming language that intends to carry forward the ideals of the Perl community. The project was formerly known as Perl 6 and was renamed to Raku as of October 2019. Raku introduces many modern concepts to the historical language while keeping Perl compatibility mode as a part of the specification. Raku is developed by an enthusiastic community of volunteers, that strive to push the language forward.

Ruby is a free and open-source interpreted, high-level, general-purpose programming language. The language was created by Yukihiro "Matz" Matsumoto from Japan in the mid-1990s. Today, Ruby has a friendly and growing community from all over the world and is openly developed and maintained. According to its creator Yukihiro, the language share many similarities with Perl, Smalltalk, Eiffel, Ada, Basic, and Lisp, all of which Ruby was influenced by.

A free and open general-purpose, object-oriented programming language developed by Ary Borenszweig, Juan Wajnerman, Brian Cardiff and a community with over 300 contributors. Crystal is statically type checked, which means that all code errors will be caught at compile time, rather than fail on runtime. Crystal provides an easy-to-learn syntax similar to Ruby, while at the same time producing performance similar to that of the programming language C.