Yeah you're probably right about over-using foreign words.
To form a connection to ROTC the name could be taken from another Skaven track: "Corruptor", "Autonomus", "Second Reality", "Data Jack", "Ice Frontier".
Perhaps go with an -ous suffix:
- Luminous (full of light)
- Victorious (full of win)
- Vectorious (full of vectors)
From the "rejected names for alux" list:
- Legions Of Light
- Ghost Commando (Ghost-Com)
- Spectral Spectres
More computer terminology:
- SIGILL
- Netcat
- Catnet
- NetBlit
- Shell
- HashFunk (okay, now I'm reaching
)
Or maybe just simply "Ethereal"?
X-Cat: Apicalypse?