[WorldMaker]

Browsers already maintain hyphenation dictionaries (and/or know how to ask host OSes for them), it's just that because hyphenation and justification are two different knobs in CSS a lot of sites turn on one without the other.

Browsers also support some of the same tricks that designer tools support to encourage/support hyphenation such as supporting soft hyphens (https://en.wikipedia.org/wiki/Soft_hyphen). But those tools are something that require training and/or forethought and not something that average web content would likely include.