Hum, voltando ao mapa de baixo, a legenda que eles apresentam na página é a seguinte:

romance_languages (verdes)

AR Aragonés (Aragonese)
AO Armâneti (Aroumanian)
AS Asturianu (Asturian)
CA (Castilian)
CT Català (Catalan)
CO Corsu (Corsican)
FP Francoprovençal
FR Français (French)
FU Furlan (Friulan)
GL Galego (Galician)
IT Italiano (Italian)
LD Ladino (Ladin)
OC Occitan (Occitan)
OL Langues d'Oïl (Oïl)
PO Portuguese
MI Mirandes
RO Romanian
SA Sardu (Sardinian)
WA Wallon (including Picard,
Lorrain, and Champenois)

Germanic_Languages_2 (laranjas)

DK Dansk (Danish)
NL Nederlands (Dutch)
EN English
FO Faroese
FY Frysk (Frisian)
DE Deutsch (German)
LU Lëtzebuergesch (Luxembourgish)
FA Frasch (Northern-Frisian)
SL Seeltersk (Saterfrisian)
SE Svenska (Swedish)
SC Scots (Scots)
MO Mócheno - Bernstoler
CI Cimbri

celtic_languages (rosas)

BR Brezhoneg (Breton)
KE Kernewek (Cornish)
IE Gaeilge (Irish Gaelic)
MX (Manx)
GA Gàidhlig (Scottish Gaelic)
CY Cymraeg (Welsh)

slavic_languages (azuis)

BI Bielorussian
BG Bulgarski (Bulgarian)
KL (Kashubian)
HR Hrvatski (Croatian)
CZ Cesky (Czech)
PL Polski (Polish)
PM (Pomak)
RT (Ruthenian)
SB (Serbian)
SL Makedonski (Macedonian)
SK (Slovak)
SL (Slovene)
SO Serbsina (Sorbian)
UA (Ukrainian)

baltic_languages (violetas)

LV (Latvian)
LT (Lithuanian)


albanian_languages (castanhês)

AL Arbërishtja/Arbërichte (Albanian)
AV Arberishtja/Arberichte (Arvanite)

greek_language (castanhos)

GR Griko

turkish_languages (azul escuro)

IA Tatar
TR Türçe (Turkish)

basque_language (laranja claro)

EU Euskera (Basque)

finn_ugric_languages (verdes claro)

EE (Estonian)
FI Suomi (Finnish)
HU Magyar (Hungarian)
SM Samegiella (Sami)
LL Livonian