English is the only major European language that does not use diacritics. German (Doppelgänger), French (résumé), Italian (città), Spanish (España), and Portuguese (Português) all use them. Dear nitpickers: words adopted from other languages do not count.
https://en.wikipedia.org/wiki/Tittle
Source: German Wikipedia article on the letter ä, the second paragraph:
The A with umlaut was originally written as AE, partly contracted (Æ / æ). Later an A developed with a small E above it (Aͤ / aͤ). The lower case e was written as two vertical lines in the further development of the Kurrent font, as well as the lower case e above the A. This spelling has been preserved to this day in the cursive script (and in Fraktur script). In the antique print, the overwritten e was stylized to two points.
https://en.wikipedia.org/wiki/Recursive_islands_and_lakes
*I have not verified that that is true. Do not write angry replies if it is not.