This plaque attached to the base of Roman League Stone bears the translation of the Latin text on the stone in German. It says (to the best of my ability to retranslate into English)

League Stone from the year 245 AD
Found at: Friolzheim, Enzkreis
Original is in the Württemberg Regional Museum

Under Emperor Marcus Julius Phillipus, the pious, the auspicious, the august, the High Priest, and by Tribunal Power, Consul, Father of the Nation and Caesar Marcus Julius Philippus.

From Portus (now Pforzheim), 5 Leagues
(A League is a Gallic distance measure = 2.2 kilometers)

League Stone translation