The Language Codes
The language codes found in the game represent only the major dialects one would find in each area. There were many more dialects, some mutually incomprehensible with others found only a few score miles distant..
B1 Basque: there are actually seven varieties
C Celtic Group
C1 Scottish
C2 Welsh
C3 Breton
C4 Irish
C5 Cornish
C6 Manx
D Dutch Group
D1 Dutch
D2 Flemish
E English Group
E1 North Country
E2 Southern
E3 Anglo-Scots
F French Group
F1 Langue d'Oil: we could go further
F2 Burgundian
F3 Langue d'Oc: we could go further
F4 Bearnese
F5 Gascon
G German Group
G1 Rhenish
G2 Swabian
G3 Swiss
H Hispanic Group
H1 Catalan
H2 Aragonese
H3 Castillian
I Italian Group
I1 Piedmontese
I2 Ligurian
I3 Milanese
I4 Venetian
I5 Tuscan
I6 Central Italian
I7 Neapolitan