is it a roman sword or a celtic one?

[Medicus matt]

I don't know very well early medieval/ irish swords, but were them so short (66 cm) and with a so triangular point ? All those I know are quite longer and with a different point.

Yes.

The longest one in the first picture is 66cm long in total.
[attachment=1:2ixl47ej]<!-- ia1 34_lagore_1_2.jpg<!-- ia1 [/attachment:2ixl47ej]

In the second image, the longest sword (second from left) is only 62cm in total and is (to my eye) very similar in form to the sword in question.
[attachment=0:2ixl47ej]<!-- ia0 34_lagore_2_1.jpg<!-- ia0 [/attachment:2ixl47ej]