is CSS hyphenation supported by all browsers?

Question

I am trying to build a site with dynamic user content in different languages.

For example:

<p lang="en">disestablishment</p>
<p lang="de">Käsekuchenbäckereibesitzer</p>
<p lang="fr">Consciencieuse</p>
<p lang="it">Imbarazzato</p>
<p lang="es">decepcionado</p>

I am using CSS to activate hyphenation:

p[lang] {
    width: 60px;

    -webkit-hyphens: auto;
    -ms-hyphens: auto;
    hyphens: auto;
}

It seems to work great on my machine, but I tried to find out if this works also on other platforms and machines. So I tried it on BrowserStack and got very different results:

	unprefixed	en	de	fr	it	es
android 11	✅	✅	✅	✅	❌	✅
ios 14	❌	✅	✅	✅	✅	✅
chrome 90 big sur	✅	✅	✅	✅	✅	✅
edge 90 big sur	✅	✅	✅	✅	✅	✅
ff 88 big sur	✅	✅	✅	❌	❌	✅
safari 14 big sur	❌	✅	✅	✅	✅	✅
chrome 90 el capitan	✅	✅	✅	✅	✅	✅
ff 88 el capitan	✅	✅	✅	❌	❌	✅
chrome 90 windows 7	❌	❌	❌	❌	❌	❌
edge 90 windows 7	❌	❌	❌	❌	❌	❌
ff 88 windows 7	✅	✅	✅	❌	❌	✅
chrome 90 windows 10	❌	❌	❌	❌	❌	❌
edge 90 windows 10	❌	❌	❌	❌	❌	❌
ff 88 windows 10	✅	✅	✅	❌	❌	✅

I found also support tables which are very different from my results:

• mozdev hyphen support
• caniuse EN hyphens
• caniuse DE hyphens
• caniuse FR hyphens
• caniuse IT hyphens
• caniuse ES hyphens

Could this be caused by languages installed on the operation systems?

Answer 1

Could this be caused by languages installed on the operation systems?

My research led me to the conclusion that it was a bug with Chromium that it only worked on Adroid and Mac. So yes, it is depending on the OS. Fixed in Canary M88, I can't say if it was implemented to stable already. Edit: It is shipped already If you have tested it with Chrome 90, this might not explain why you didn't get the desired results on Chrome/Edge on Windows 7 & 10. However, this all might lead you to the right direction, especially the Platform Support Explenation:

This feature enables the Android's hyphenation engine on all platforms, except Mac keeps using the hyphenation engine in the platform.

https://bugs.chromium.org/p/chromium/issues/detail?id=652964