Ok, I am sorry - not really - but this is design madness. 

Seperate tables for each lookup table.  Surrogate int keys when appropriate (almost always).  This keeps referential integrity possible - hello thats the point of a relational database.

ISO codes - give them a column with a unique constraint.

Never, never, never design anything that uses triggers for referential integrity unless it is as a last resort.

I want my lookup tables to be easy to use

Select F.Comments, S.StatusCode

From Form F

Join Status S

On F.StatusID = S.StatusID

Where F.FormID = 34567

There, I have comment and the text version of the status information, something the user can read.

Also, if I want to cache Status Code information somewhere the table is small and light so it is easy to cache as say XML