One important consideration is how you’d get contributors. The vast majority of a language tool’s users would be most proficient in that particular language, an

One important consideration is how you’d get contributors. The vast majority of a language tool’s users would be most proficient in that particular language, and using that same language maximises the project’s sustainability. Tools implemented with a foreign toolchain require a much longer initial runway, and may eventually still die simply due to the small intersection between people who care about the project and and who understand enough to maintain it.