In the patched version 1.7 (GOG, Steam), there are some bugs like "can't talk to anyone bug" after arriving to Kordar - Upper Hadar. This is old, unpatched version.
Just unzip/copy file kb_old.exe to your game directory and lauch game from it if necessary.
Bug fix for "I can't talk to anyone after arriving to Kordar". Place the files kordar_1.atoms.loc, kordar_1.embryos.loc, kordar_1.lus.loc to your game directory: ..\YOURGAME\sessions\base
Čeština - český preklad textov do King's Bounty: Legend. Prekopírujte súbor loc_ses.kfs do adresára s hrou, podadresára "sessions" a prepíšte ten pôvodný.
Originál samozrejme doporučujem najskôr odzálohovať.