Text search language field

I'm working on project with some large text areas that will need to be
searched, and I'm trying to set up an indexed text search field to make
things a bit smoother.  Only one of the top requirements is that this has
to be multi-lingual, so I should be using the correct language's text
search.  The table stores the language the text is in, so in theory this
should be easy...  But it seems to be a bit more subtle than it first
appears.  Any ideas on the best way to set this up?

Tables:

Resource:
    "text_element"    text,
    "text_search"    tsvector,
    "language"        char varying(3) references "languages"

languages  (This is 'static' list of ISO 639-3 codes, to make sure
everything uses the same codes):
    "code" character varying(3) primary key,
    "description" character varying(100)

Trigger (This is my first draft):
create trigger "textsearch_trig" before update or insert
   on "resource" for each row execute procedure
   tsvector_update_trigger_column("text_search", "language",
"text_element");

The trigger currently throws an error 'column "language" is not of
regconfig type' whenever I try to use it, and I'm looking for the best way
to solve that.  The 'simple' solution of 'create text search configuration
eng ( copy = pg_catalog.english );' didn't work.  Before I start into a
long exploration into why and what should be done about it, I thought I'd
seek wisdom.  ;)

Daniel T. Staal

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