I am using "Hyphenate-This!" with azw3-files for "old" kindle-reader and German texts. With nearly every (German) text the hyphenation with the plug-in works.
But some days ago I have converted a German text from pdf to epub (and after editing converting again to azw3, but his makes no difference) and tried several time adding soft-hyphens with the "Hyphenate This!"-plugin. After some time of investigations I realized that the plug-in only added soft-hyphens to text which is enclosed by / between <i class="calibre9"> and </i>, not into "normal" text w/o this tags. Checking this with ebook-edit and searching for "\xad" as "regex" soft-hyphens are only found in text in/between <i class="calibre9"></i> and only this text is displayed with hyphenation. After some research I have learned hat also ebook-polish does insert soft-hyphenations and after doing this with ebook-polish the soft-hyphens are in the complete text: They are found with "\xad" and also are working when displaying the text.
Seems as if the plug-in has a bug and ebook-polish does some things different than the plug-in.
After this I remembered vague that I have realized in the past, that the plug-in did not work with a few other ebooks. Unfortunately I donīt know enough about the structure of .epub, .azw3 etc. for further analyzes.
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