If you don't find an email adres or no one responds anymore, send it to translations@moodle.org, according to the notices in the translation guide.
for pl you'll find some contacts here
for cs you'll find some contacts here
Please send translations to the coorditator of your language. See this page for the email adresses. It's important he/she knows what happens with the language pack 
.
If you don't find an email adres or no one responds anymore, send it to translations@moodle.org, according to the notices in the translation guide.
for pl you'll find some contacts here
for cs you'll find some contacts here
If you don't find an email adres or no one responds anymore, send it to translations@moodle.org, according to the notices in the translation guide.
for pl you'll find some contacts here
for cs you'll find some contacts here