**Phased release of mul v1.0**
| Phase | Where | Feature flag (see T316767) | Task
| ----- | ----- | ----- | -----
| 1. Test release | test.wikidata.org | Full feature (`mul` visible for everyone, on-boarding element) | THIS TASK
| | beta.wikidata.org | Limited feature (`mul` only visible via Babels, no on-boarding element) |
| 2. Limited release | wikidata.org | Limited feature (`mul` only visible via Babels, no on-boarding element) | T330281
| 3. Full release | wikidata.org | Full feature (`mul` visible for everyone, on-boarding element) | T312176
**Acceptance criteria:**
[] VFull version v1.0 of `mul` language code is deployed to Test Wikidata, set to Full Release (see T316767)
[] Version v1.0 of Limited version of`mul` language code is deployed to Beta Wikidata, set to Limited Release (see T316767)