Swift
Swift is an open compiled language with value types, protocols, structured concurrency, and direct Apple SDK integration.
Why use it
iOS and macOS companions, native plugins, and backend services can share one language and package manager.
Where it fits
Find engines, frameworks, code libraries, version control, and production automation.
What to check
Windows, Linux, and cross-platform graphics ecosystems are less complete than Apple's, and consoles require separate toolchains.