Yes, just about everyone calls the trema an umlaut: fine, but mention. Xah at Blogger: Diacritics: Trema, Umlaut, Macron. So why should I choose one over the other?
As nouns the difference between umlaut and trema is that umlaut is (linguistics) an assimilatory process whereby a vowel is pronounced more like a following. Entity parsing tremadiaresis vs umlaut - Readable Entity parsing tremadiaresis vs umlaut. Used as a replacement for convenience since the letter v is not used in pinyin. Accent Marks: Trema, Umlaut, Macron, Circumflex, and All.
Talk:umlaut - Wiktionary Umlaut is a linguistic phenomenon best known in German, but Turkish also has a form of it. And I also knew that an umlaut changes pronunciation, not syllabification. The Curse of the Diaeresis - The New Yorker abr.
Trema vs. dieresis (diaeresis) in Wordorigins Archive (03)
Umlaut vs Trema - What s the difference? Entity parsing tremadiaeresis vs umlaut - Readable Entity parsing tremadiaeresis vs umlaut.

