For ease of reference here are all the biscuit entries by region first and then country:
Africa
The Americas
The Oreo
The American Biscuit
S’mores
The Maple Cream Cookie
The Antipodes
Asia
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
Iced Garden Biscuits
Jammie Dodgers
Gingerbread Stars
Lady Fingers
Water Biscuits
Easter Biscuits
Shepherds’ Welsh Biscuits
Chocolate Pearl Biscuits
Shortbread
The Bath Oliver
Baked Apple and Custard Biscuits
Border Lemon Drizzle Melts
The Club Biscuit
Yorkshire Parkin Biscuits
The Jaffa Cake
Party Rings
Continental Europe
Aprikozenkoejke
Baci del Chiostro
Ballerina Biscuits
Les Biscuits Roses de Reims
Bredele
Chocoline Cookies
Cookies of Joy
Croquants aux Amandes et Miel
Czech Poppy Seed Biscuits
Doris Tryffelli
Franska Våfflor
Galettes Bretonnes
Greek Olive Oil Biskota
Grisbi Extreme Cookies
Latvian Beciņas
Linecke Cukrovi
Macarons
Mesi-Käpp Käpaküpsised
Navettes
Nurnberger Lebkuchen
Roshen Hazelnut Wafers
Savoiardi Biscuits
Selga Biscuits
Sicilian Mystery Biscuits
Sju Sorters Kakor
Stroopwafels
Zuccherini al Caffe
The Middle East
Australia
Belarus
Belgium
Aprikozenkoejke (The Elisabeth Biscuits)
Canada
Czech Republic
Linecké Cukroví
Czech Poppy Seed Biscuits
Denmark
Estonia
Finland
France
Bredele
Navettes
Galettes Bretonnes
Macarons
Les Biscuits Roses de Reims
Germany
Greece
Holland
Israel
Italy
Zuccherini al Caffe
Grisbi Extreme Cookies
Sicilian Mystery Biscuits
Savoiardi Biscuits
Baci del Chiostro
Japan
Latvia
Selga Biscuits
Latvian Beciņas
Miscellaneous
The Dog Biscuit
Lemon Moon Biscuits
Florentines
Jacoba’s Biscuits
Hamantaschen
Nigeria
Norway
Sweden
Ballerina Biscuits
Sju sorters kakor
The Biscuit Bestiary 