沃尔西语是意大利语族的一支，操这种语言的人叫沃尔西人，沃尔西语和奥斯坎语、翁布里亚语联系很紧密。

证实沃尔西语存在的是在维莱特里（Velletri）发现的一个小铜盘上的铭文（现保存在那不勒斯博物馆），刻于公元前三世纪，曾经用作献给德克鲁努斯神的祭祀器物，碑铭上的语言的独特性显示它与伊库维碑铭上的翁布里亚语是同一类，它的特点是软腭音“q”的唇音化（沃尔西语 pis = 拉丁语 quis），喉音“c”后面跟“i”时，读成上腭音（沃尔西语 facia = 拉丁语 faciat）。这一点与翁布里亚语很相似，但不同于拉丁语和奥斯坎语，它的所有双元音都转变成单元音（沃尔西语 se，奥斯坎语 svai；沃尔西语 deue，古拉丁语和奥斯坎语 deiuai 或 deiuoi），从地理上讲，在北面的拉丁语和南面的奥斯坎语的包围中，很奇怪会出现这种语音变化现象，但从复杂历史运动中分析，这种变化又很明显。

Volscian was a Sabellic Italic language, which was spoken by the Volsci and closely related to Oscan and Umbrian.

It is attested in an inscription found in Velitrae (Velletri), dating probably from early in the 3rd century BC; it is cut upon a small bronze plate (now in the Naples Museum), which must have once been fixed to some votive object, dedicated to the god Declunus (or the goddess Decluna). The language of this inscription is clear enough to show the very marked peculiarities that rank it close to the language of the Iguvine Tables. It shows on the one hand the labialization of the original velar q (Volscian pis = Latin quis), and on the other hand it palatalizes the guttural c before a following i (Volscian facia Latin faciat). Like Umbrian also, but unlike Latin and Oscan, it has degraded all the diphthongs into simple vowels (Volscian se parallel to Oscan svai; Volscian deue, Old Latin and Oscan deiuai or deiuoi). This phenomenon of what might have been taken for a piece of Umbrian text appearing in a district remote from Umbria and hemmed in by Latins on the north and Oscan-speaking Samnites on the south is a most curious feature in the geographical distribution of the Italic dialects, and is clearly the result of some complex historical movements.