Hyphenation and word breaks without hyphens

[bert-github]

Section
https://w3c.github.io/low-vision-a11y-tf/requirements.html#hyphenation
talks about hyphenation. Not all script use hyphens. And maybe the issue is not whether there is a hyphen or not, but whether the two parts of a word are on separate lines. Or maybe those are two different issues?

The latest CSS draft, e.g., proposes two separate properties to control the breaking of words:
hyphens - for scripts that use hyphens, to allow breaking at language-defined places.
word-break - break without using hyphens, using language-dependent rules about separable letter-pairs.

(Hyphenation may not just cause parts of a word to be separated and a hyphen to be added, but it may even change the spelling of each of the parts. But maybe that is already implied by the text.)