Analysis of information sources in references of the Wikipedia article "English terms with diacritical marks" in English language version.
The special tool we use here at The New Yorker for punching out the two dots that we then center carefully over the second vowel in such words as "naïve" and "Laocoön" will be getting a workout this year, as the Democrats coöperate to reëlect the President.
The following diacritics and special characters display: Diacritics: acute Á ; circumflex  ; grave À ; tilde à ; umlaut Ä. Special characters: thorn, lowercase þ ; thorn, uppercase Þ.
Diacritical marks – Diacritical marks are a range of accents and other symbols, which indicate that the sound of a letter is modified during pronunciation. These are rare in English but relatively common in other languages.