I am looking for a free Android app that lets me configure any number of strings (texts) along with a custom note. The app should recognize the texts from the camera via OCR and display the appropriate note. All of this should happen locally.
Being able to copy the configured string->note list from one device to another (file transfer, via USB) is a plus. Configuring the list via a GUI is not strictly necessary, I'm also fine with just putting a handwritten Json file at some specific place.
Background/use case: I, in a place that uses Latin script, am expecting visitors who are not able to read Latin script. To enable them to find their way back, I would like to provide them with a means of scanning some important bus stop names and other signs and get an explanation about those signs that I configured beforehand, without them needing to use data roaming or a local SIM card.
EDIT: Steve Barnes' answer made me aware of another possible issue: Quite some of that location-finding might be happening underground, where GPS is only of minor quality or unavailable.