LANGUE DE CHAT (ラングドシャ) means cat's tongue in French, and ラングドシャ is the name of food used in Japan, which is a chocolate-flavored milk biscuit (it is said that because Milk is very fragrant and strong, so babies like it very much.

Fruit shops abroad or places selling local specialties all over Japan may have "ラングドシャ" selling various flavors or brands, so it is normal for Oita Prefecture in Kyushu to have this kind of biscuit.

SAKU SAKU (サクサク) means that food tastes crisp and smooth.

If you have to eat this kind of biscuit, then find an imported one-White Lover (made in Ishiguro), which should taste very similar.