/**
 * Russian text normalization for preProcess.
 *
 * Reads cardinals positionally in the nominative case (masculine where
 * gender matters, feminine for the thousands group since "тысяча" is
 * feminine). Plural agreement is applied for thousand/million/billion
 * scales and for the recurring units (рубль/доллар/процент/etc.) using
 * the standard 1 / 2-4 / 5+ split.
 *
 * What's intentionally NOT here: case agreement with the counted noun
 * past the immediate currency/percent words. Reading "5 книг" as
 * "пять книг" vs "пять книги" requires morphological analysis of the
 * surrounding noun, which is out of scope for a text-only preProcess.
 */
export declare function expandRussianText(text: string): string;