蓝精灵

tā men zhǐ yǒu sān gè píng guǒ de gāo dù cāo liú lì dàn méi yǒu rén míng bai de lán jīng líng huà

他们只有三个苹果的高度，操流利但没有人明白的“蓝精灵”话。

Only as tall as three apples, they speak in "Smurf", a language that only the understand.