We use style_options and layout_paragraphs on a multi-language sites factory, it's really efficient and allow us to propose a lot of layout and behaviors for contributors.
I see that style_options yml labels for fields and options are not translatable. The module layout_paragraphs is based on the core layout library, using the LayoutPluginManager which allow region and label to be translated.
The style_options fields and values are not translated.
Add a TranslatableMarkup conversion in StyleOptionPluginManager, as it is done in LayoutPluginManager, for all labels from the yml files.
Propose an adapted solution.
Translation of the contribution form.
None.
Probably getLabel method will have a change in definition.
Otherwise I do not know.
Active
1.1
User interface
I finally give it a try, and I saw that the way it's implemented in LayoutPluginManager is different and cannot work with the multi yml files of style_options.
I think the solution I proposed to apply it on the contruction of the StyleOptionPluginBase is more efficient. Let me know what you think.