These guides were created for Polish genealogy research, but of course, the language guides can be applied for other areas of the world as well. Poland did not exist for well over 100 years and during this time it was split up into areas known as Prussian, Russian, and Galicja (Austrian). Languages from each of these countries became the language used in legal documentation, so eventually you will encounter those languages for the specific area of Poland your ancestors lived in. Latin is found in the Catholic Church in many countries in the world, so this language guide can be used by many people doing research. Polish will be useful for Polish research. Russian translation guides will be perfect for any of the areas that Russia occupied over the years and the German guide for Germany.