Meteor + Blaze – If else statement

Spacebars uses the same control flow structure as handlebars so the answer is the same as this one. In your case:

{{#if en}}
  {{text.en}}
{{else}}
  {{#if tc}}
    {{text.tc}}
  {{/if}}
{{/if}}

Side note – one of the nice things about jade is that it supports else if.

Sometimes a better alternative is to move the logic into a helper like this:

Template.myTemplate.helpers({
  textValue: function() {
    if (this.en) {
      return this.text.tc;
    } else if (this.tc) {
      return this.text.tc;
    }
  }
});

<template name="myTemplate">
  <p>{{textValue}}</p>
</template>