Webfont problem with CALT

Hi guys.

I worked on changing quotesingle to quoteleft and quoteright depending on the context with CALT.

There is no problem with Glyphs program, but when I look at it as a Web font, it is not applied only to Korean.

2. web

It seems to be a problem with not recognizing the Korean language when using CALT.
Does anyone know where I should inquire about this?

This should not be done by the font, but by the layout engine.