Changing wording of 'custom discount' on checkout page

Topic summary

A merchant using the B2B app SparkLayer needs to change the “custom discount” label on the checkout page, which appears in Dutch (“Aangepaste korting”) regardless of the site’s language settings (English/German).

Core Issue:

  • SparkLayer applies line-item discounts for quantity pricing that Shopify displays as “custom discount” at checkout
  • The label doesn’t translate properly across the store’s three languages
  • Standard theme content editing hasn’t resolved the problem

Attempted Solutions:

  • Editing theme content strings (unsuccessful)
  • Checking Admin discount settings (not applicable since discount isn’t manually created)
  • Contacting SparkLayer support (they indicated it’s controlled by Shopify’s content)
  • Reaching out to multiple support teams (no success)

Current Status:
The issue remains unresolved. The original poster has accepted the limitation after exhausting support options. Another user expressed interest in the same solution. A late suggestion recommends navigating to: Online Store > Themes > Edit default theme content > Checkout & system > Checkout order summary > Custom discount, though it’s unclear if this differs from previous attempts or will successfully address the translation issue.

Summarized with AI on October 29. AI used: claude-sonnet-4-5-20250929.

Hi,

I think you should contact this app to they guide you update. All apps will have the document to guide. Hope you can resolve this issue.