If I create a custom field for a Sales Order for example. Like the supplier number of the Sales Order.

Then I want to show the supplier number for all Sales Orders templates, which I can do.

The problem is that if I have templates in other languages, the field (which goes in the header) always has the name in English! There is no way to customize the label of the template for the custom field which makes it incompatible in multi-language Sales Orders!

Is there a way of doing this?