In your Meteor app directory, enter:

meteor add ansyg:tap-i18n-schema

This package add attachI18nSchema method to TAPi18n.Collection.

var Posts = TAPi18n.Collection('posts', {
  languages: [ 'de', 'en' ],
  base_language: 'de'
});

Posts.attachI18nSchema({
  title: {
    label: 'Title',
    type: String,
    max: 80,
    i18n: true
  },
  description: {
    label: 'Description',
    type: String,
    max: 80,
    i18n: true
  }
});

So you can see that now TAPi18n.Collection have one additional option it is array of languages. Also when you want that your fields will be translated, you need pass i18n option to field object.