This'd honestly be pretty interesting to see, because it'd flip the script for her pretty hard. Stuck in a world where she doesn't speak any of the languages (while Elemental Nations-ese is depicted as structurally similar to Japanese, we've seen actual Japanese in the story and they're ancient ritual words nobody speaks conversationally) while she's the only person around with ninja powers. Major roadblocks in front of her social-spec skills and yet her martial skills are unexpectedly uncontested.
Would she just stick around learning the language for long enough to get back into the swing of social-spec manipulations? She could, but that would be boring, and she's probably not willing to burn that much time in the first place, not if she wants to figure out what happened and how to get back. So as a story what we'd see is Ami playing her social-spec game to the best of her ability even through extremely limited grasp of human language, relying a lot more heavily on her martial talents to bridge the gap.
She might, for instance, start building up a reputation for herself in stories and rumours, to test the waters and see how society reacts. She won't be ready for her usual social-spec playground until she learns the language, but she can build herself up in the meantime so that once she can hold a proper conversation with people there's weight behind her words. Once she's seen that there don't seem to be any ninja here, and that people seem astounded by basic ninja feats, she'd have to lean into that to create the reputation she desires. At the same time, she can't afford to get too close to people, not while she can't speak. She'd have to let her actions speak for themselves and then withdraw immediately afterwards. Of course, she'd want to look flashy for this, larger than life, someone worth telling stories about.
In summation, I believe that if you isekai'd Ami into the modern world she'd promptly become a Magical Girl.
