Localize creature and spell descriptions

[benwebber]

Consider a tiddler with the following fields:

Field	Value
dnd.creature.size	medium
dnd.creature.type	humanoid
dnd.creature.tags	orc
dnd.creature.alignment	chaotic evil

According to the convention in the English material, we should render the description like:

Medium humanoid (orc), chaotic evil

Different languages have different conventions:

Humanoïde (orque) de taille M, chaotique mauvais

We need language-specific template strings to interpolate the field values, translating them where necessary. If a field is missing or empty, it should not appear in the description. For example, if a creature has no tags, we should render:

Medium beast, unaligned

Instead of:

Medium beast (), unaligned

We would use the same system for spell and item descriptions.