The "Deserializer" for "application/json" files that are Objects (with minimum "title" field), or Arrays of such objects, does include a check to see if the value is a string:
```
if(typeof incomingFields[f] === "string") {
fields[f] = incomingFields[f];
}
```
The worflow would be to drag& drop the JSON file into a wiki with the plugin installed, and use the Import tools in the JSON tiddler's toolbar to import each object as its own tiddler.
You can even map json field names to tiddler field names, and there's some other options.
Best,
Joshua Fontany