Steps to Reproduce

trigger a jq.alert without parameters in any non-english locale

jq.alert('test');

Actual Result

The button label is always 'OK' regardless of locale

Expected Result

The button label should be msgzul.OK (internationalized OK label value)

Debug Info

the default button is created when getButtons is called with an empty opts.button:
called in jq.alert:
https://github.com/zkoss/zk/blob/4f24fc11451896b7c03f720a584aba509512a0f9/zul/src/archive/web/js/zul/dom.js#L111

if opts.button is empty:
a default button with hardcoded label 'OK' is created instead
https://github.com/zkoss/zk/blob/4f24fc11451896b7c03f720a584aba509512a0f9/zul/src/archive/web/js/zul/dom.js#L60

Root Cause

Workaround