Their language differs very slightly from Roman Latin of that date; for apparently contracted forms, such as Fougno instead of Fucino, may really only be a matter of spelling.

In final syllables, the diphthongs ai, ei, and oi all appear as e. On the other hand, the older form of the name of the tribe (dat.

Martiis) shows its derivation and exhibits the assibilation of -tio- into -tso-, proper to the Oscan language but strange to classical Latin.

The Marsian inscriptions are dated by the style of the alphabet from about 300 to 150 BC (the middle Roman Republic).

The text of the plaque is as follows:[2] It seems to be or describe a votive offering (donom) perhaps of boars (apruf) to the local goddess(es) Anctia (a[n]ctia) on behalf of the Marsian Legions (pro le[gio]nibus martses).