Līkuts Princis — in Old Prussian language.

Old Prussian was a Baltic language spoken in the area that is now part of northeastern Poland and the Kaliningrad province of Russia. It was spoken by the Old Prussians, a now-extinct ethnic group that lived in the region before it was conquered by the Teutonic Knights in the 13th century.

Old Prussian is known primarily from a few dozen surviving texts, mostly religious in nature, that were written in the Latin alphabet. The language is closely related to other Baltic languages, such as Lithuanian and Latvian, but it has some unique features that set it apart.

One notable feature of Old Prussian is its extensive use of inflection, particularly in the noun and adjective declensions. The language also has a rich system of verbal conjugation, with distinct forms for the different persons, tenses, and moods. Another interesting feature of Old Prussian is its use of vowel quantity, with long and short vowels distinguished in the language. This is in contrast to many other European languages, which have lost this distinction over time.

Old Prussian was already in decline by the time it was first recorded in writing, and it gradually disappeared as the Old Prussian population was assimilated into German and Polish cultures.