Kryptonian or Kryptonese is language or the fictional planet Krypton, birthplace of Superman. The language appears in writing in the Superman comics at first as random squiggles. Then during the 1970s E. Nelson Bridwell created an alphabet of 118 letters, Kryptonese, from the squiggles.
In 2000 DC Comics introduced a transliteration alphabet containing symbols for each of the letters of the English alphabet. They also started referring to the language as 'Kryptonian'. They just used this alphabet to write things in English in the comics. A more complex version of Kryptonian alphabet appears on the TV show Smallville.
All human beings are born free and equal in dignity and rights. They
are endowed with reason and conscience and should act towards one another
in a spirit of brotherhood.
(Article 1 of the Universal Declaration of Human Rights)
Information about the Kryptonian alphabet and fonts