> Linux and Windows don't have built-in dictionaries.
Every Linux distribution I've ever been on has had a dictionary. I'm not sure what package it's in, but the point is that packages exist, and can be depended on (or, although I dislike this, vendored in).
(Is it perhaps that they need a dictionary with the syllabic breakdown of the word? IDK if the normal dictionaries will give you that, or if it can be computed or heuristically determined?)
https://bugs.chromium.org/p/chromium/issues/detail?id=605840
Especially considering LaTeX had this right for decades - and it is one of the major issues for good and pleasant readability... sigh.