Polyglot seems to be online (here and now). What’s not working for you, mazbrili?
The site SSL certifcate is considered as invalid:
It’s Common Name (CN) is declared as *.usermd.net, which doesn’t match with i18n.kacperkasper.pl.
Could Kacper Kasper fix this issue? Meanwhile, one have to add SSL exception to access the site.