Historical clue formulations

• ___-Aztecan — 2014-05-09
• ___-Aztecan language — 2012-09-18
• ___-Aztecan language — 2007-12-30
• ___-Aztecan language — 2007-12-15
• ___-Aztecan languages — 2000-06-22
• ___-Aztecan — 1999-07-17
• ___-Aztecan (language group) — 1996-04-21