18.4 From a new token to a new language

ARTISTIC separates four claims that are easily collapsed.

1. Lexical abbreviation. A new token reproduces an image or a meaning already expressible by an existing prompt.

2. Concept naming. A new token names a stable visual distinction already representable by the frozen generator.

3. Productive extension. A new symbol or relation composes systematically with previously unseen objects, attributes, and scenes.

4. Transformational extension. A new grammatical constructor or visual ontology requires an extension of the conditioning or generative model.

Textual inversion provides an important baseline for the first two levels: it learns new word embeddings from a small set of images while freezing the text-to-image model. ARTISTIC claims more only when the construction has a declared type, compositional laws, counterfactual visual consequences, and transport beyond its defining examples. An arbitrary private code or adversarial embedding is not a language merely because it controls a model.

. A visual word is admitted through its productive use: what it denotes, how it combines, which controlled changes it causes, what it leaves invariant, and whether another reasoner can learn and reuse it.