Okay, so here is my ultimate list of expected civs and their focuses. I won't change it anymore, unless something is denied. Let's see how correctly could I predict.
Medieval
Arabs - scientist
Aztecs - militarist
Byzantium - aestethe
England - builder
Franks - expansionist
Khmer - agrarian
Mali - merchant
Mongols - militarist
Vikings - militarist
Teutons - expansionist
Early modern
Dutch - scientist
Joseon - scientist
Kongo - aestethe
Ming - merchant
Mughals - builder
Ottomans - expansionist
Poland - agrarian
Spanish - expansionist
Tokugawa - militarist
Venice - merchant
Industrial
Austria - expansionist
British - scientist
French - expansionist
Iran - aestethe
Iroquis - merchant
Nepal - militarist
Russians - builder
Siam - aestethe
Swedish - scientist
Zulu - militarist
Modern
America - scientist
Brazil - aestethe
China - builder
Ethiopia - agrarian
Germany - militarist
India - aestethe
Italy - scientist
Japan - expansionist
Korea - merchant
Soviets - scientist
Medieval
Spoiler :
Arabs - scientist
Aztecs - militarist
Byzantium - aestethe
England - builder
Franks - expansionist
Khmer - agrarian
Mali - merchant
Mongols - militarist
Vikings - militarist
Teutons - expansionist
Early modern
Spoiler :
Dutch - scientist
Joseon - scientist
Kongo - aestethe
Ming - merchant
Mughals - builder
Ottomans - expansionist
Poland - agrarian
Spanish - expansionist
Tokugawa - militarist
Venice - merchant
Industrial
Spoiler :
Austria - expansionist
British - scientist
French - expansionist
Iran - aestethe
Iroquis - merchant
Nepal - militarist
Russians - builder
Siam - aestethe
Swedish - scientist
Zulu - militarist
Modern
Spoiler :
America - scientist
Brazil - aestethe
China - builder
Ethiopia - agrarian
Germany - militarist
India - aestethe
Italy - scientist
Japan - expansionist
Korea - merchant
Soviets - scientist