The Translation Stack of a Modern WordPress Site (2026 Architecture)

Strip any multilingual website to its skeleton and the same five layers appear. Naming them clarifies every tool decision you’ll make.

Where products actually differ

Every competitor bundles these layers with different ownership lines. SaaS platforms own layers 2–4 on their servers (the dependency). Duplication plugins implement layer 2 as post copies, pushing layer 5 into manual labor. Quota products meter layer 1 with a margin.

Our reference architecture

Engine: your key, either provider, hot-swappable. Memory: one indexed table in wp_db — backed up, migrated and staged with everything else (model). Serving: path prefixes, page-cache friendly. SEO: emitted automatically per page. Review: click-to-edit on the live site.

The test for any vendor

Ask which layers they own, where layer 2 physically lives, and what each layer costs at 5x your current content. The answers sort the market in minutes.