# How to remove diaeresis after hyphen

To quote Wikipedia:

In Dutch, spellings such as coëfficiënt are necessary because the digraphs oe and ie normally represent the simple vowels [u] and [i], respectively. However, hyphenation is now preferred for compound words so that zeeëend (sea duck) is now spelled zee-eend.

Because the diaeresis is used to indicate that two letters should not be read as a digraph, it should be removed when this is indicated in an other way (a hyphen at a line break, for example). There are still cases where hyphenation removes the diaeresis: ‘financiën’ should be hyphenated as ‘fi-nan-ci-en’.

Unfortunately, when using

``````\usepackage{polyglossia}
\setdefaultlanguage{dutch}
``````

the word is hyphenated as ‘financi-ën’ (when hyphenation happens at a line break). Is it possible to make XeLaTeX/Polyglossia remove the diaeresis when hyphenation happens?

The language-specific options in the Polyglossia manual do not offer a solution to this problem. The Babel manual mentions the `\@trema` macro, and indeed, when using pdfLaTeX and Babel, `financi"en` is hyphenated correctly (removing the diaeresis) at line breaks. I did find this ugly hack, but I am convinced there should be a better solution.

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I'm afraid there isn't, with the current hyphenation algorithm. –  egreg Apr 3 '13 at 20:51