I have four tables:

CREATE TABLE [Languages]
(
  [Id] INTEGER IDENTITY(1,1) NOT NULL,
  [Code] NVARCHAR(10) NOT NULL,
  PRIMARY KEY ([Id]),
  UNIQUE INDEX ([Code])
);

CREATE TABLE [Words]
(
  [Id] INTEGER IDENTITY(1,1) NOT NULL,
  PRIMARY KEY ([Id])
);

CREATE TABLE [WordTranslations]
(
  [Id] INTEGER IDENTITY(1,1) NOT NULL,
  [Value] NVARCHAR(100) NOT NULL,
  [Word] INTEGER NOT NULL,
  [Language] INTEGER NOT NULL,
  PRIMARY KEY ([Id]),
  FOREIGN KEY ([Word]) REFERENCES [Words] ([Id]),
  FOREIGN KEY ([Language]) REFERENCES [Languages] ([Id])
);

CREATE TABLE [Categories]
(
  [Id] INTEGER IDENTITY(1,1) NOT NULL,
  [Word] INTEGER NOT NULL,
  PRIMARY KEY ([Id]),
  FOREIGN KEY ([Word]) REFERENCES [Words] ([Id])
);

So you get the name of a Category via the Word -> WordTranslation -> Language relations.

Like this:

SELECT TOP 1 wt.Value
FROM [Categories] AS c
LEFT JOIN [WordTranslations] AS wt ON c.Word = wt.Word
WHERE wt.Language = (
  SELECT TOP 1 l.Id
  FROM [Languages]
  WHERE l.[Code] = N'en-US'
)
AND c.Id = 1;

That would return the en-US translation of the Category with Id = 1.

My question is how to map this using the following class:

public class Category
{
  public virtual int Id { get; set; }
  public virtual IDictionary<string, string> Translations { get; set; }
}

Getting the same as the SQL query above would be:

Category category = session.Get<Category>(1);

string name = category.Translations["en-US"];

And "name" would now contain the Category's name in en-US.

Category is mapped against the Categories table.

How would you do this and is it even possible?