What are your favorite fun/happy facts?

More language facts:

• "Buffalo buffalo buffalo buffalo Buffalo buffalo buffalo" is a grammatically correct sentence in English, meaning something like "The Buffalo New York buffalo (pl.) habitually bully the buffalo (pl.) which the Buffalo New York buffalo (pl.) habitually bully.
• "Versus versus versus versus versus versus versus" is a grammatically correct sentence in Latin, meaning something like "the verse turned towards the other verses was turned toward the other verses".
• "Vicious" is the adjectival form of "vice".
• "Egregious" once meant outstandingly good. It arrived at its current meaning when it became in vogue to use it sarcastically.
• The (archaic) English words for the day after tomorrow and the day before yesterday are "overmorrow" and "ereyesterday", respectively. These are much more elegant, IMO.
• The German and French word for tuxedo is "smoking"
• A hapax legomenon is a word that only occurs once in a text, a body of work, or a language. For example, the word "honorificabilitudinitatibus", the state of being able to achieve honor, occurs exactly once in the works of Shakespeare, in Love's Labour Lost.
• "Honorificabilitudinitatibus" is also the longest word in English with alternating vowels and consonants.
• "Glimmer, gleam, glisten, glitter, etc.", all begin with the prefix "gl", and have something to do with shimmering, shining, light, etc. It would appear that the prefix itself is what conveys this meaning, as "immer, eam, isten, itter, etc." certainly do not. This is called a "phonestheme", a cluster of arbitrary sounds that appears in multiple words, and indicates a specific conceptual idea. Other examples are "sh" (shimmer, shine, sheen), "sl" (slip, slide, slime, slick, slug), and "sn" (snarl, snout, snort, snot).
• A pseudo-anglicism is a word or phrase in another language that is borrowed from English elements but does not itself exist in English. Examples include the German words Handy "phone", Beamer " projector", and Wellness "Spa".
• In German, Gift means poison, though it shares the same etymological origin as the English.
• In Orwell's constructed language "Newspeak", the antonym of any word can be formed via the addition of the prefix "un", e.g. unbig, untall. This feature was borrowed from the constructed language "Esperanto", which utilizes a similar construction with the prefix "mal", e.g. malgranda "small", malalta "short".
• The common Easter greeting "He is risen" uses an archaic perfect tense construction in which the verb "to be" is the auxiliary verb rather than "to have", because "to rise" is a verb of motion, and in the Proto-Germanic language from which English stems, "to be" was used with motion verbs. This feature is still present in other modern Germanic languages such as German, e.g. er ist gekommen, literally translated, he is come (he came). In modern English the phrase would be "He has risen". Another famous example is "I am become Death, the Destroyer of Worlds" from the Bhagavad Gita.
• The Latin abbreviations for the names "Gaius" and "Gnaeus" are C. and Cn. respectively. This is because the Etruscans, from whom the Romans initially adopted their writing system, lacked a "guh" sound and consequently a letter to represent it, so when the abbreviations were standardized, the names were spelled Caius and Cnaeus, and their respective abbreviations remained even once the Romans developed the G.
• The ampersand symbol & is a cursive form of the Latin et meaning "and". It was also once thought of as a letter of the alphabet.

Will update if I think of any more.