If my memory serves me well, the eastern european accent is missing in your version. You need to move it to another one.
From the original sound patch (the descr_factions_accent.txt of v0.8.3 you sent to me):
Code:
accent English
factions england, kievan_rus, russia, poland, hungary, denmark, norway, lithuania, teutonic_order
accent Scottish
factions scotland
accent French
factions france
accent German
factions hre
accent Mediterranean
factions venice, pisa, sicily, papal_states, byzantium, spain, portugal, aragon, timurids, slave
accent East_European
factions
accent Arabic
factions milan, turks, moors, egypt, kwarezm, rum
accent Mongolian
factions mongols, cumans
accent Jerusalem
factions jerusalem
That's the one you should use for SS6.4 - I guess.
About SSHIP, I'm afraid that you'll need to re-install SS6.3 and SS6.4 before to re-install the package I'm preparing for you and then to install the sound patch and proceed as usual with the .idx and .dat files in the sounds folder.
I'll do my best to provide it soon but from today to Tuesday, that's the carnival in Dunkirk and I've very limited free time