Use when translating or localizing UI strings, marketing copy, documentation, or any source text into Norwegian (no / nb Bokmål / nn Nynorsk). Asks the user to choose Bokmål (~85%, default) or Nynorsk on first use, then enforces variant vocabulary (jeg/eg, ikke/ikkje, hva/kva), 3-gender system (en/ei/et), V2 word order, «…» quotes, DD.MM.YYYY, comma decimals, universal du-form, hybrid-compound verb rejection, and source-register matching.
