Saakha - Adam Parrish

Safo - Andreas Eckardt

Saiwosh - Frank Legros

Sakao

Sakatda Ka Kadomo - Barry Garcia

Salanjan - Drydic_Guy

San Corrado Langue - Jan Skrob

Sap'e'o - Jonathon Bly

Saphah - Anton Kemmeren

Saprutum - Marconatrix

Sapuho Dejeru

Sarbleski - H. Miller

Sarjan - Manel Jaume Sales

Sarkelean

Sarminath - Edward field

SASXSEK - Dana Nutter

Sathir - David J. Peterson

Satritain - Luther Blissett

Saurian - James Gurney

Scallin - Kaurpin

SCSL - Shanya Spiritskunk

Sea Elvish - Curtis Mullings

SedoNeural - Merle D. Zimmermann

Seimi - Daniel Andreasson

Sekponh - Rory

SeMpaiton - N. Kuitse

Senelhian - Keolah

Sen:esepera - Jeffrey Henning

Senu Yivokuchi - Pablo Flores

Senyecan - Charlie Brickner

Serasraes - Rodlox

Sermo - Jose Soares Da Silva

Seversk - Libor Sztemon

Sevorian - James Campbell

Seyekoneth - Michele C.

Shadebu - Pentekonter

Shaelic - Scott Hutton

Shaleyan - James

Shan

Shaquelingua - Remi Villatel

Sharioléh - Eugenio M. Vigo

Sheli - David J. Peterson

Shemdaoli

Sheng - unknown

Shilgne S'drawkab C'navdair - Tom R.

Shinoarnii - Shiari

Shkanshej - Pablo Flores

Shoa - J. Harness

Shondan - David C. Morrow

Shotali

Sialy - Aaron Morse

Sidanjala - C. Newburn

Sidonian - Dtsdesign

Signuno

Siidmak - Mia Soderquist

Silarg - JP Mallaroni

Silindion - Elliott Lash

Simlish - Maxis Games

Simpekso - Jonathon Grimes

Simpenga - Jeffrey Henning

Simpla - Samuel Fredrickson

SIMPLE

Sinampaiton - Paul Hoffman

Sindarin - J.R.R. Tolkien

Sinnish - Scott 'Blade' Hamilton

Sintí - Psiphim6

Sitarwelas

Skandinaviska

Skerre - Doug Ball

Slavenian - Libor Sztemon

Slavisk - Libor Sztemon

Slezan - Jan van Steenbergen

SLOVIO - Mark Hucko

Slvanjec - Benct Philip Jonsson

Sohlob - Benct Philip Jonsson

Solresol - Jean Francois Sudre

Somerish - Bo Bernvill

Somish - Aaron Chapman

Sona - Kenneth Searight

Sorgalo - Carlos Cervera

Sotonok

Speedtalk - Robert A. Heinlein

Speedwords - Dutton, Reginald J. G.

Spelin - Georg Bauer

Spet - ACZ

Spocanian - Rolandt Tweehuysen

Spokil - Adolphe Charles Antoine Marie Nicolas

Stālāg - Pablo Flores

Star Trek languages - Mr. Klingon

Stitch Words - Disney

Straifpin'r - Dtsdesign

Streich - Tommaso Donnarumma

Strelwidhan - PyterVoeros

Strom - Stephen Fry & Hugh Laurie

Sturnan - Christopher Wright

Sulekhï

Suma - Barnett Russell

Sunset Elvish (Pinuidan) - Curtis Mullings

Suoníppomí - Eric Anger

Susachi - Bradford L. Lewis

Svargó - Stefan Lubbersen

Swa-di - Bradford Morgan White

Syldavian - Hergé

Sylvyn

Szkev - zbihniew