Version 3.9.0

• Add - Adds Croatia (HR) to the list of countries supported by Google Merchant Center.
• Add - Marketing notifications system.
• Add - Multi-lingual support for markets, currencies, and shipping feeds.
• Fix - Fixed an issue that affected product sync when current user has no personal WPCOM token.
• Fix - Avoid memory exhaustion fatals when loading Google Ads performance reports.
• Fix - Estimated shipping times no longer show validation errors when continuing onboarding without changing the prefilled defaults.
• Fix - Resolve autoload collisions resulting in undefined trigger_deprecation() errors.
• Fix - Verify data source during Merchant API product sync.

What's Changed

[Add] New Features 🎉

• GOOWOO-833: Add Croatia to the list of supported countries by @AlejandroPerezMartin in #3634
• Feature: Notifications System by @jamesmorrison in #3590
• Feature: Multi-lingual Support by @jamesmorrison in #3491

[Fix] Fixes 🛠

• Fix: Resolve autoload collisions resulting in undefined trigger_deprecation() errors by @joemcgill in #3655
• Fix: Product sync failures related to WPCOM health checks by @jamesmorrison in #3278
• Avoid memory exhaustion fatals when loading Google Ads performance reports. by @zamanq in #3648

[Dev] Developer-facing changes 🧑‍💻

• Update WPCS to 3.4.1 by @triple0t in #3644
• Add E2E coverage for campaign creation via dashboard (onboarded users) by @ankitrox in #3255
• Fix: E2E tests for Optimize Campaign step in onboarding flow by @joemcgill in #3670

Other Changes

• Compatibility testing with Woo 11.0 by @ankitguptaindia in #3667

Full Changelog: 3.8.1...3.9.0