Earlier quoted context omitted.
Then you should probably add kotlin and java together as well. They share the same purpose, use the same VM, usually live in the same project, have native compatibility, are used with the same frameworks, etc.
JS is a valid TS, Kotlin is not a valid Java (only at a bytecode level, but then you might as well combine all JVM languages).
But you can easily have both of them in the same project (e.g. when slowly moving to kotlin) and have them interop.