The Intergalactic Senate is a fellowship of M4ndalore and another unknown body. Until the year 4061, when the unknown plant joined, this governmental body was simply known as the Galactic Senate.

Glossary

I.S.U.N.: Intergalactic Senate Universal Name - The name a plant is known as throughout on all senate worlds.
I.S.I.D.: Intergalactic Senate Intrinsic Demonym - A word used to refer to citizens of a planet on all senate worlds. Traditionally, a standard variation of the I.S.U.N.