Whoever is doing DARPA’s PR and, apparently GR, since I guess federal agencies have to do that now, deserves a raise.
What probably happened is umlauts were used a lot in German and some lazy typesetter wasn’t going to waste a perfectly good block sitting around that he could reuse
Your idea is unfortunately naïve about current usage.
- umlaut
- diaeresis
- trema
A diaeresis signals you pronounce the vowel separately, a trema signals the pronunciation of the previous vowel (e.g. in the French ambiguë), an umlaut changes the sound of the vowel ( the German a sounds a bit like the English a in bat, but ä sounds like the English e in bed).
In this instance the double dot is a diaeresis.
https://thelanguagecloset.com/2023/05/27/diaresis-trema-umla...