Most of these bilingual Chinese dictionaries cross-reference lang and gan to langgan, but a few translate lang and gan independently. In terms of Chinese word morphology, láng 琅 is a free morpheme that can appear alone (for instance, a surname) or in other compound words (such as fàláng 琺琅 enamel and Lángyá shān 琅琊山 Mount Langya (Anhui)) while gān 玕 is a bound morpheme that only occurs in the compound lánggān and does not have independent meaning.