Non-Starfleet stuff doesn't really belong in a Starfleet Technical Manual.
I'm talking about things like Vulcan wedding gowns and civilian clothes. T'Pring's bridal gown could easily been one of dozens that year in the V'rawang catalog, or whatever. I'd suggest doing pages of something like that instead of shoehorning it into a Starfleet manual.
Documenting the general elements of Vulcan culture we've seen, such as the ceremonial weapons, might better be done in a Vulcan Science Academy manual on Vulcan history and culture. Pages from that could be fun, for some.
Standardized ambassador clothing might come out of a Federation manual for diplomats, and so forth.