Historical clue formulations

• Language in which "crossword puzzle" is "krucvortenigmo" — 2023-08-03
• Language in which "Hello, how are you?" is "Saluton, kiel vi fartas?" — 2021-01-23
• Literally, "a hopeful person" — 2018-09-06
• Language in which plural adjectives end in -aj — 2018-04-28
• It has just 16 rules of grammar — 2011-09-22
• The 1965 William Shatner film "Incubus" is in it — 2009-04-18
• Language in which plurals are formed by adding -oj — 2007-07-24
• Lingua franca, for some — 1997-03-14
• "Saluton! Kiel vi fartas?," e.g. — 1996-08-16