[@OtomostheCrazy]
The RP's lore has the dark elves using a different dialect of elvish but you can use sindarin all the same it don't matter. 
[@boomlover]
The dwarves are very interesting, as Uldgorin is the last dwarven territory remaining, most dwarves tend to leave as much as possible to the preservation of the city. Whatever valuables that aren't given to heir are claimed by the city to help pay for whatever expenses, their bodies are placed in special funeral caskets which are placed in the lava rivers thaf flow at the lower levels of the city. The actual funeral reception for the common dwarf is much as you explained, with feasting to commemorate their lives. As for notable figures in their society the funeral procession is solemn as they mourn the loss of a contributor to the Uldmer people.