/** A dipthong permissible in Ithkuil. */
export type Dipthong = "ai" | "ei" | "ëi" | "oi" | "ui" | "au" | "eu" | "ëu" | "ou" | "iu";
/** An array containing all permissible dipthongs in Ithkuil. */
export declare const ALL_DIPTHONGS: readonly Dipthong[];