Silly question 😅

Question

What coding language is used to program coding programs?(like notepad++,dev c++ etc.)For example what coding language has been used to develope notepad++?

Answer 1

The same ones as always.
you can easily google that notepad was built with c++, c.

Answer 2

In one program using more than two programming languages

Answer 3

Sublime text for example was built by Python and another language that I don't remember

Answer 4

VScode in TypeScript, JavaScript, CSS
Notepad++ in C++
DevC++ in Delphi
intellij in Java, Kotlin (Java IDE written in java) XD

IDE can be written in any programming language (if it provides GUI stuff) Their sole purpose is to provide basic Editor area where you can right your code, Language specific syntax highlighting, intellisense and Compiler/Debugger Shortcuts or terminal window to show outputs (or more).
The Point is, there is no Specific Language for IDE development.