Updating translations when page is updated

[efrysf]

I'm using wagtail_localize. I have it connected to google for a machine translation backend.
My use case requires that translations are created on publish rather than on create, so I turned off syncing, and moved some code into a django trigger on the publish signal. So far, so good.

However.

When I update the English version of a page and republish it, the English version is updated, but the translations are not. I believe I have traced the issue to here:

wagtail-localize/wagtail_localize/operations.py

Line 38 in f5690d0

source, created = TranslationSource.get_or_create_from_instance(instance)

When the translate_object is called, it seems that there is no provision to update an existing translation. TranslationSource has an update_or_create_from_instance method, which I think will do what I want, but a quick search does not show that this method is called from anywhere.

Am I missing something on how to use this library? Is the update_or_create_from_instance method vestigial, or aspirational?