noun
development language
A programming language used for software development. Domain-specific computing term.
このプロジェクトでは、開発言語としてPythonを使っています。
In this project, we use Python as the development language.
プログラミング言語 is the general term for 'programming language', while 開発言語 specifically refers to a language used in a development context.
Compound of 開発 (development) and 言語 (language).