/**
 * A regular expression matching legal single-letter word-initial consonant
 * forms.
 */
export declare const LEGAL_WORD_INITIAL_1_CONSONANT_FORMS: RegExp;
/** A regular expression matching legal two-letter word-initial consonant forms. */
export declare const LEGAL_WORD_INITIAL_2_CONSONANT_FORMS: RegExp;
/**
 * A regular expression matching legal three-letter word-initial consonant
 * forms.
 */
export declare const LEGAL_WORD_INITIAL_3_CONSONANT_FORMS: RegExp;
/**
 * Checks whether a consonant form is allowed in word-initial position.
 *
 * @param consonantForm The consonant form to check.
 * @returns A boolean indicating whether the consonant form is a legal
 *   word-initial consonant form.
 */
export declare function isLegalWordInitialConsonantForm(text: string): boolean;