Alright, an update... text is basically done:
Needs a formatting and proofreading pass is all (unless I find some more text I missed).
Other good news is I've got image replacement mostly working:
Turns out one of the tools I'm using is bugged for some image types, including one I need to edit. But I have a backup plan that believe should work.
I'm probably not going to try to edit the "fancy" buttons (like those lower-right in first screenshot). My image editing skills aren't really up to the task of cleaning up something like that so I can put text on it. There are already tooltips on them (which I've translated) so it's not like you won't know what they do.
Bad news is RL has me tied up for probably the rest of the week. But I should be back to work by the weekend.