What matters in practice
- 01
Reproduced the fatal after network activation.
- 02
Traced the missing callback to the plugin activation module.
- 03
Loaded the upstream module before language bootstrap using a must-use compatibility plugin.
- 04
Re-tested frontend output, WP-CLI initialization, and the REST pages endpoint.
Evidence boundary
This guidance distinguishes verified engineering practice from unmeasured outcomes. No client result, guaranteed ranking, security guarantee, or performance promise is implied.
Frequently asked questions
Why not edit the plugin directly?+
A direct vendor edit would be overwritten by Composer. The compatibility layer keeps the fix reviewable in the project.
Does this prove all multilingual content is migrated?+
No. It proves runtime compatibility on the clean local database. Production language data still requires a backed-up migration verification.