Vaguely remember a story where Spike couldn't talk, (or something along those lines.) I think he was cursed? The only way he could way someone had to speak his full name and Giles finally called him a prat and he could talk again. I think I read this on elysian but I couldn't find it there. Help?

The only thing I can think of is this:

SILENCIO by Fojiao2 –ó
Spike can't speak because of a bet with Buffy, but it just allows her to hear his heart more clearly. COMPLETE. Spoilers through "Older and Far Away" (Season Six).

This is a cute story but no, not the one I was thinking of.

I don't thing it is the one you're looking for because in this one it is Angel who cursed Spike and is the only one who can brake it.
But I can try :

Unspoken by Anaross
Summary: "I've always envisioned him giving Buffy a garden that he could never go to in the daytime, to give her something alive for a change." James Marsters. Set post Not Fade Away.

I absolutely remember the fic you're talking about. I remember the scene well, and I'm coming up empty trying to remember. It's driving me crazy!

Yeah it's not Unspoken, but it's nice to know that someone else remembers the one I'm thinking of. I was starting to think I imagined it.

I'm trying to think of this one as well... sounds very familiar.

This summary seems like it could be what your looking for??

Silence by Bugg WIP
What if Spike never told Buffy he loved her, what if he couldn't speak at all.

No this isn't it either. The fic I read was completed. Thanks though.