I mean I agree with your points that if I want to develop and distribute the games by myself then I shall learn the basic English and I believe it's quite common thing to do, but the country I am living in, South Korea, a lot of people tend to avoid using other languages than Korean - probably due to some "unfamiliar" letters and pressure from school days, not sure tho - so it's not a problem actually, but I just wanted to pose some more "options" for others.
And for the tools, no offense or disrespect but those tools are mostly based in English and other languages which have a lot of references, examples, and some sorts of "regularity" while the Korean language is relatively irregular to some degree - so still the "translator tool" brings some "uncanny valley" to the players and other auditions for such platforms, that's why I questioned if I may help or contribute for the language support as a volunteer.
Anyway, thanks for your opinion.