How does PanLex name languages and their varieties?
Every language variety in PanLex has a code and a label. The code begins with three ASCII letters identical to the most appropriate ISO 639-3 code or collective-language ISO 639-2 code, as documented in the ISO 639-3 standard. Examples: English eng, Nahuatl nah, Tamil tam, American Sign Language ase, Esperanto epo. PanLex appends a 3-digit uniqueness suffix to this code to form the variety’s name, permitting up to 1,000 varieties per language code.