Letters people mix up
თ and ტ: the two Georgian t sounds
თ and ტ are both "t", one with a breath after it and one without. Getting them right is the difference between sounding foreign and sounding clear.
Side by side
t tani
თ is the t of "top", with a puff of air after it.
More about თt' t'ari
ტ is ejective: close your throat, then release the t with a pop and no breath.
More about ტ
Hear them in words
Tap a word to hear it. Listen for the difference, then say it after George.