I juste write a plugin to add tabbed navigation in Polylang.
For the moment, you can't modify attached post IDs, so I don't remove default meta box.
Don't hesitate to improve it :)
That's really nice to share this. I am not really satisfied by the current metabox. But it provides the functionnalities I want, so I keep it as is for the moment. However all proposals and add-ons like this one are welcome !
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