Adobe ACROBAT READER 7.0 Manual page 65

About Central- and Eastern European-language Adobe
PDF files
You can work with Adobe PDF files that contain Cyrillic text (including Bulgarian and
Russian), Central European text, and Eastern European text (including Czech, Hungarian,
and Polish), if the fonts are embedded in the PDF files. If the fonts are embedded, you can
view and print the files on any system. Fonts do not need to be embedded to use the
Search feature.
Note: If you open a PDF file in which form fields or text boxes contain these languages
but the fonts are not embedded and are not installed on your system, the Updates
command automatically prompts you to download and install the necessary language font
kits.