WooCommerce plugin 2.6.1

• Multilanguage support: plugin architecture compatible with Polylang.
• Per-language synchronization queuing: one database row per (item, language) pair for independent language processing.
• Language-aware sync executors: Product, Category, and Format classes now support language context injection via sync_blog_id and sync_lang_code properties.
• Multilingual field filtering: automatic detection and filtering of language variants in item data to reduce database payload size.
• Language mapping configuration in modal: per-site language-to-Sales Layer language mapping with real-time validation.
• "Migrate Legacy Items" tool: idempotent migration tool for items created before multilanguage support was enabled.
• Language and blog context in sync logs: all "initialized" and error messages now include blog_id and language code for easier debugging in multisite/multilang scenarios.
• Migration utility class (Migration): handles legacy item metadata assignment and Polylang translation group linking.
• Enhanced Site & Language Configuration modal: unified title for multisite-only, multilang-only, and combined scenarios.
• Counter calculation in sync queue: multiplied by language count to reflect actual database rows inserted in multilang mode.
• Language mapping dropdowns now only show available Sales Layer languages per connector.
• Updated FAQ descriptions, in addition with multilanguage setup instructions and "Migrate Legacy Items" tool documentation.
• Multi-site target assignment: lang_code now correctly assigned only to targets whose blog_id has that language configured.
• Empty targets in queue rows: language-specific queue rows only include the blog_id that needs that language (no empty targets).
• Minor fixes.