(I'm ignorant of the language though, I don't even know if you use the cyrillic alphabet).
No. Latin.
As
scottro said
be better off putting something about Polish in the title.
Localization is a non trivial topic - better ask for a specific language.
In general:
At first you have to set your locale variables to a certain language (There are several things languages differ in: the way time and date is presented, currency, values, etc.)
Do a
locale to see what they are currently set to, and see
hb 25 for details on this topic.
Depending on the language, the software you use (desktop environment, dictionaries (word correction, auto word filler),... LaTeX, whathaveyou), and how consequently you want/need the localization, additional things need to be installed or configured, like installing a dictionary, additional fonts which provide special characters, needed letters, or signs of the language, or telling some certain software to work in a certain language if this ain't correctly autodetected by checking the above mentioned localization variables.
Maybe also additional keyboards and drivers are needed.
For some languages there are ports: chinese, french, german, hebrew, hungarian, japanese, korean, polish, portuguese, russian, ukrainian, and vietnamese
But I neither know what they do, nor how good they satisfy individual needs. I only presume they are meant for to do most of the set up work for a certain language, and contain very language specific things.
However, better was to ask:
"How do I set up my machine in [polish/vietnamese/...]?"
The community's poles/vietnameses/... may give you betters determined answers.
