From what I can tell, Black Studio (or someone) would need to modify the widget. It’s more involved than just enabling the tabs because you also need a title field for each language and there is limited space.
For now, if you’re stuck, use the qTranslate language QuickTags in the Title and Content fields. I can confirm that this works. For example:
[:en]This is the English text[:fr]Ceci est le texte en francais.
Best regards,
Michael
Hello,
I never used qTranslate before for multilingual websites, since I prefer WPML, but I tried it after your post. The actual version of Black Studio TinyMCE Widget is not natively compatible with qTranslate, but I think it may be possible to implement a solution similar to the one provided by the qTranslate extension plugin, which only works with standard text widgets (not wysiwyg), even if this may be not as easy as it seems. I will evaluate this for future versions.
In the meantime you may use the quick tags as suggested by mjm4842.
Another alternative is to create multiple widgets, one for each language, and show them conditionally using a plugin like Widget Logic, Widget Context or Dynamic Widgets.
