Outcome: Alta in your language, per user — teammates keep their own choice.
Where to find it
Click your avatar → Personal info → Language.
Steps
Open Personal info and find the Language card.
Pick Español (Beta), Deutsch (Beta) or Français (Beta). The product switches immediately, no reload needed.
Pick English (US) to switch back.
Click the image to watch the clip (recorded in Alta).
Good to know
The setting is per user and follows you across accounts.
Numbers, dates and charts still use English formatting while a locale is marked Beta; the label disappears once formatting follows the language too.
This is the interface language only. Outreach languages for Katie and Alex are set per campaign in the Pitch step and are not affected.