When this marking is used in languages such as Afrikaans and Dutch with the letter e, it is known as a deelteken. Although this use has fallen out of favor, this marking used to be used on words such 
When this marking is used in languages such as Afrikaans and Dutch with the letter e, it is known as a deelteken. Although this use has fallen out of favor, this marking used to be used on words such as cooperate and reelect to show that the paired vowels in those words were two syllables. In German, this diacritical marking can be replaced by putting an e after the letter it marks, which can only be an a, o, or u. For 10 points, name this mark also known as a diaeresis that is two dots above a letter.
When this marking is used in languages such as Afrikaans and Dutch with the letter e, it is known as a deelteken.
{umlauts} [or {tremas}; or diaeresis before it is read]