How to label images in meteorJS application

I want to label images through your defined tags in meteor application. I went through the following packages: yogiben & meteor-simple-schema but was not able to find something concrete.

Additionally, meteor schema is using

MySchema = new SimpleSchema({ firstName: { type: String, label: function () { return Session.get("lang") == "de" ? "Vorname" : "first name"; } } });

but I want the user to apply label dynamically.