Our crowdsourced translation resource, weblate, was updated February 29 to reflect new features and changed strings in App Inventor. This strings will appear in English until our wonderful volunteer translators can update our translations.
If you are interested in translating App Inventor, you can learn more here: About Translating App Inventor
Please note that I have to be notified when a translation update is ready for review and release. Changes to weblate do not roll into app inventor automatically.