Word not included in the chain

Hello Loco Translate team,

Since the update of extension product add-ons, we have not been able to translate a word that has been replaced by the developer while it tells us that it appears in the source of the translation file.

This is the word “sub total” replacing the word “grand total”
On the changelog of extension, we can see: * Update – Changed default Grand Total verbiage to Sub total for a more accurate description.

The old word “grand total” which until now could be translated always appears in the translation chain but no longer serves because now it is “sub total” that appears on the front end as the developer notifies.

The revision of the source file: woocommerce-product-addons.pot is up to date.

This change prevents translation while this term is very important.

How can this new word be detected by Loco Translation?

I thank you in advance for your help.

Best regards,

Hugo