import type { LintError } from '../lint.types.js';
/**
 * @purpose Validates that JSDoc contracts and file headers use English, not Russian/Cyrillic.
 * @implements {LanguageCheck} in specs/cli/lint/lint.spec.md
 * @invariant Scans JSDoc blocks and file header lines (// @file:, // @consumers:).
 * @invariant Pure function — no I/O, no exceptions.
 * @param content Source text to validate.
 * @param filePath File path for error messages.
 * @returns List of lint errors in ascending line order, empty when no Cyrillic found.
 */
export declare function check(content: string, filePath: string): LintError[];