> The Deppenapostroph is not to be confused with the English greengrocer’s apostrophe, when an apostrophe before an ‘s’ is mistakenly used to form the plural of a noun (“a kilo of potato’s”). Grocer's apostrophes annoy me, along with words like "advices" (advice is an abstract noun and can't be plural, like "happiness") and "learnings" (use "lessons" instead).
"informations" is a good one for non-native English language speakers to look out for.
Nonsense. Informations has long been used in English. I have before me a letter by Albert Einstein to Norbert Wiener regarding a young Kurt Eisemann, in which Einstein writes, "From his letter enclosed here, you will get informations about his life and studies before he arrived here." And in the Princeton translation of Aristotle's Constitution of Athens one finds, "The Eleven also bring up informations laid against magistrates alleged to be disqualified". Informations is perhaps a bit obscure but it's perfectly valid.