tsalagi - "Cherokee".
-sgo - This is a question suffix. Usually in Cherokee, the first word in the sentence carries the question suffix.
Examples:
ᎯᎠᏍ ᏪᏌ? - hias wesa? - Is this a cat?
ᎦᏚᏍᎪ ᏣᏚᎵᎭ? - gadusgo tsaduliha? - Do you want bread?
ᎠᏍᎦᏯᏍ ᎯᎪᏩᏘᎭ? - asgayas higowatiha? - Do you see a man?
Common questions suffixes are: -s, -sgo, -tsu.