[KevinH]

Attached to the first post in this thread is a BETA level version of the next Access-Aide plugin (v0.9.0-Beta) that I would love to have testing and feedback on.

The major changes in this versions are:

v090 - Beta
- completely removed the use of the Tk graphical user interface for image alt text editing because Tk and Pillow have no support for pure svg images and the built in converter was very incomplete.

To replace it, The Qt for Python graphical user interface as provided by
PySide6 (for Qt6) and PyQt5 (for Qt5) is used instead. The resulting Qt
based Alt Text Editing dialog is much improved and much more stable.

As a result the new minimum supported version of Sigil is: ***Sigil 1.60 or later***

- if the OPF package tag does not have an xml:lang element to indicate the primary language of its metadata tags, one is now added based the primary epub dc:language


So if you have Sigil 1.6.0 or later and are willing to test this new Access-Aide and feedback issues or success, please give this one a try.

I will try to keep an equivalent Tk version updated for at least the next year for those who do not use Sigil 1.6.0 or later or those who do not have access to PySide6 or PyQt5 for their external Python plugin interpreter. All Windows and Mac versions of Sigil from 1.60 to today already have the necessary pieces in place to run this Beta.

Thanks for helping out!