example of how to assign translations to a variable with liquid.

liquid_example

{% case system.language %}
{% when 'de' %}
  {% assign customer_number_label = 'Kunden Nr.' %}
  {% assign order_number_label = 'Bestell Nr.' %}
{% when 'en' %}
  {% assign customer_number_label = 'Customer No.' %}
  {% assign order_number_label = 'Order No.' %}
{% endcase %}


<div>
  <label>{{ customer_number_label }}</label>
  <input type="text" />
</div>
<div>
  <label>{{ order_number_label }}</label>
  <input type="text" />
</div>