This is a mod I made for people like me who've played Enderal for the first time and fell in love with it's history and lore, but ended up a little disappointed by the various discrepencies between the other games.
Like the difference of the magic system, and the undead not being called Lost Ones.

The mod is only in English for now, as I don't know German good enough to make a separate .esp myself and I feel like I don't have time for it.

This mod only renames magic schools, 2 NPCs, 3 Mountain Monastery cells, 4 or 5 items, and some undead mobs. Also changes the attribute descriptions and skill trainer dialogue options to suit the renamed magic schools.

Renamed Magic Schools:
Destruction-->Elementalism
Restoration-->Light Magic
Alteration   -->Mentalism
Illusion       -->Psionics
Conjuration-->Entropy
Mysticism -->Arcane

Renamed NPC's:
Taranor-->Taranor Coarek
Konstantin   -->Constantine Firespark

(Renamed cells are the magic shops inside Mountain Monastery to suit the new magic school names)

Renamed Items:
Rune Sword      -->Rune Blade (this is actually an artifact from one of the previous games, Myar Aranath, and wasn't named appropriately)
Wind-Steel        -->Steel Wind (because Wind Steel is a terrible name and doesn't make sense grammar-wise too)
Tyrfing, Avenger Of Light-->Tyrfang, Avenger Of Light (again, makes more sense)

Also renamed the "Thorium enhanced sword" so that the next two words are capitalized properly, and renamed Almanac of Conjuration to Almanac of Entropy.

Also zombies and it's variants are renamed into various Lost Ones, and skeletons and it's variants into various Fleshless Lost Ones. I also renamed Ghouls into Grotesque Lost Ones. 

Renamed some of the Summon Undead spell effects to Summon Lost Ones (v1.1)

I've also added the skill perk milestone texts back (the stuff that pops up when you reach skill levels 25, 50 and so on), because it felt awkward to see a blank page, also the skills still use the perks that come with them, so they are still informative.

I might be forgetting something, but otherwise this must be all the changes. 

Installation:
Extract the .rar file into your Nehrim's Data folder, don't forget to check the .esp from the Data Files section in your launcher and hit Apply.
Make sure to load this below any Translation mod. For potential maximum compatibility, you might as well load it last.