I am using since 30+ years keyboards without the German Umlaute in the original German writing with 2 horizontal dots above and a, o, u, and replace it with ae, oe, and ue, which is also correct German. However, all German spellchecker I ever used display an error when ae, ue, or oe is used.
I add all these words manually into the user defined dictionaries.
As I assume that there are quite many people around the globe with the same issue I wrote this enhancement request.
Provide a German dictionary, which includes the ae, ue, and oe way of writing. I am willing to contribute my user defined dictionary for extracting all words. I have user defined dictionaries in LibO, MSO and Thunderbird.
By the way, the same can be made for the German sz-character and its replacement with ss. My collection of such words are also in my user defined dictionaries, which I offered to contribute.
Operating System: Windows XP
Last worked in: 220.127.116.11 release
clearly not a regression
I doubt that it is useful to add thousands of alternative words, more useful would be an option "accept replacements".
If "accept replacements" could be enabled, that would even be better. It would be only replacements for ae, ue, oe, and sz. This would even be a feature MSO doesn't have. I am looking forward to see this in LibO.
Andras: you might be interested in this one. I don't know if "accept replacements" as Rainer suggested in comment 2 should be used but if this is the case, some code pointers may be useful.
This should be reported to upstream, LibreOffice uses German Hunspell dictionary as is. See http://extensions.libreoffice.org/extension-center/german-de-de-frami-dictionaries
Adding the following lines to .aff file give the desired result, but there may be drawbacks that I did not think of, or the request is invalid -- I cannot judge, because I'm not a German linguist.
ICONV ae ä
ICONV oe ö
ICONV ue ü
ICONV sz ß