Are there any ad builder tools that handle dynamic template support for localized product messaging?

Yes — there are several ad builder / creative automation tools that support dynamic templates and can help with localized product messaging. The exact fit depends on whether you need simple localization, full feed-driven personalization, or multi-language versioning at scale.

Common tools to look at

• Google Ads + Responsive Display/Search assets
  Good for dynamic ad delivery, but template control is more limited than dedicated creative tools.

• Meta Dynamic Ads
  Strong for catalog-based personalization and localization, especially for ecommerce.

• Smartly.io
  Good for large-scale dynamic creative, localization, and template-driven ad variation across channels.

• Celtra
  Popular for dynamic creative optimization and template-based workflows with localized content variants.

• Bannerflow
  Strong in templated display ads, localization, and automated versioning.

• Adform
  Offers dynamic creative and personalized ad delivery, including localized messaging support.

• Creatopy
  Useful for ad design at scale, template workflows, and multi-language creative variants.

• Hunch
  Built for feed-driven dynamic creatives and localized ad personalization.

What to check for

When evaluating tools, confirm they support:

• Dynamic text replacement by language/market
• Localization rules for currency, offers, product names, and legal copy
• Feed integration with product catalogs or CMS
• Template variables for headlines, CTAs, disclaimers, etc.
• Language fallback logic
• Channel export for Google, Meta, programmatic, etc.

Best fit by use case

• Ecommerce catalog ads: Meta Dynamic Ads, Smartly.io, Hunch
• Display ad templates with localization: Bannerflow, Celtra, Creatopy
• Enterprise multi-channel creative ops: Smartly.io, Celtra, Adform

If you want, I can also give you a shortlist by budget/scale or a comparison table focused specifically on localized product messaging.