For ease of reference, here are all the biscuit entries to date:

America

The Oreo

Belarus

Chocoline Cookies

The British Isles

The Prince of Biscuits
The Humble Digestive
The Rich Tea Biscuit
The Hobnob
The Chocolate Hobnob
English Jumbles
The Malted Milk
Dark Chocolate Gingers
Almond Thins

Canada

The Maple Cream Cookie

Czech Republic

Linecké Cukroví
Czech Poppy Seed Biscuits

Denmark

Franska Vafflor

Finland

Doris Tryfelli 

France

Bredele
Navettes
Galettes Bretonnes
Macarons

Germany

Cookies of Joy

Holland

Stroopwafels

Italy

Zuccherini al Caffe
Grisbi Extreme Cookies

Japan

Pocky Biscuits

Jewish

Hamantaschen

Latvia

Selga Biscuits

Miscellaneous

The Dog Biscuit
Lemon Moon Biscuits

Norway

   Ballerina Biscuits

Ukraine

Roshen Hazelnut Wafers