In multi-lingual sites, the user interface of the site will appear in the preferred language of the current user. The same site will be displayed in English, French or Spanish, based on who accesses the site. You can even localize the column names, to make the forms appear in the preferred language.
When you add tabs and tab descriptions, they will appear in the language in which they were created. So if the site creator uses English, the tab names will appear in English even when the current user sees the site in French.
We now added a new feature to Ultimate Forms that allows you to translate the tab names and descriptions into additional languages. They will then appear to user translated into the preferred language (provided of course that you included the relevant translation).
Note that section names and fragments cannot be currently translated.
NOTE: the feature currently applies to the app version only. There is an existing translation mechanism in the on-premises version, the new app mechanism will be migrated to the on-prem version in the future.