Gem

The language code refers to the ISO-639-2 and ISO-639-3 codes.

• en (english)
• fr (french)

The language code may be followed by a hyphen and a country code or a country variant:

• zh-CN
• zh-Hant

Accepted pseudo language codes:

• post (postal codes)
• icao, iata, faac, tcid (airport codes)
• abbr (abbreviation)
• link (link to website)
• phon (phonetics)
• piny (pinyin)
• wkdt (wikidataid)
• unlc (UNLOCODE)
• nuts (EU NUTS code)
• lauc (EU LAU code)

• p. = preferred
• s. = short
• h. = historical
• c. = colloquial