in order for expressions to load with motion data
they have to have their japanese names.
here is a cheat sheet for copy and pasting the symbols into the correct facial slot
this is especialy good if you want to rig game models with mmd working facials. copy the japanese symbol and paste it into the JName slot above the english name for the facial.
Mouth Facials
a = あ
i = い
u = う
o = お
e- = えー
grin = にやり
Triangle = ▲
Eye Facials
blink = まばたき
smile = 笑い
wink = ウィンク
wink2 = ウィンク