Mid-Galactic Standard was a dialect of Galactic Basic Standard in use during the lifetime of the holoplaywright Peshosloc, over fifteen thousand years before the Battle of Yavin. Peshosloc wrote his holoplay Xim at Vontor in Mid-Galactic Standard, though the version presented in Ronton's Anthology to Galactic Literature, Vol. 2 had been modernized for contemporary Basic speakers.
Appearances
"Endgame" — Endgame (Reprinted and collected in The DarkStryder Campaign, Deluxe) (First appearance)
Sources
The Emperor's Pawns Endnotes, Part 4: Mistress of Teräs Käsi on Only Sith Deal In Absolutes! — Abel G. Peña's StarWars.com Blog (original site is defunct)
Xim Week: The Despotica (Part III: Xim at Vondor) on Hyperspace (article) (content obsolete and backup link not available) (First identified as Mid-Galactic Standard)
Endnotes for The Written Word on jSarek's Infonet — John Hazlett's StarWars.com Blog (original site is defunct)