I kind of get it if she's around and cannot tell if your chat is work-related or not. You could be telling your colleagues to go cut the red wire but she knows it ought to be the blue wire. She could've jumped in at that point to correct you, had she understood. But the bomb went off already and everybody died. I'm exaggerating the stakes here obvs.
I would try to keep shit in English when she's within earshot. And if she sneaked up on you while you're practicing your Spanish, apologize, acknowledge her wishes, and tell her you were just talking about the weather or the game or whatever. She might just be nervous about you talking about her behind her back - while she's in the room. So put her mind at ease. Don't piss off the higher-ups unless you're willing to lose the job.
If you're looking for a more sure fire way, don't use the app/your phone. Go to Google takeout and download all your contents from Photos onto your computer - if you have access to one. They come in zip files, which you can then unpack and store everything on your nextcloud server.
Edit: important info in the replies below.