World archives Project: Alternate keyboards
From Ancestry.com Wiki
Speed of data entry on foreign-language projects may greatly be improved by setting up an alternate keyboard that supports the language.
For Polish I recommend the Polish Programmers keyboard as it is basically a standard QWERTY keyboard with the Polish characters entered by use of the RIGHT-ALT+Letter combinations. This key is called AltGR.
to get the capitals, simply press shift, and the appropriate AltGr combination
To set this up see the following article