I'm looking for a script that repeats what I just said, all in local chat.

[ChrisRodiez]

You know, I say something in local chat and the script says the same.

[Rolig Loon]

Add a listen event to the basic Hello Avatar script. That should do it.  Be really careful, though.  A script like that will create a lot of annoying spam and will add potential load to the region's servers. You could produce chat lag for everyone around you. 

[animats]

2 minutes ago, Rolig Loon said:

Add a listen event to the basic Hello Avatar script. That should do it.  Be really careful, though.  A script like that will create a lot of annoying spam and will add potential load to the region's servers. You could produce chat lag for everyone around you. 

And put in enough checking to make sure that two of them in the same place don't create an endless loop.

[Mollymews]

if you are meaning that you want a chat relay then google on keywords LSL CHAT RELAY

there are quite a few opensource versions available