By the default, buttons and menu options in the community are displayed in English. If you would like to use the community in a language other than English, you need to follow the instructions below. Please note that you can only change your preferences to a language that is currently available. The language that you want to use might not be available at this time. Please don't change your language preferences to a language that you don't speak, just to try it out, as you might have trouble navigating the options to switch it back to the default, English.
Post titles and content are still going to show in English. This is an example of what the community looks in Spanish, with part of the UI that are translated highlighted with red boxes:
The steps are the same for switching back to English, only that now all the options will show in the non-default language that you selected. The screenshots below show a switch from Spanish back to English.
Navigation path: Your Profile -> My settings -> Preferences -> Dropdown for language -> Select the language of your choice from the ones available
All buttons and menus in the community should how in English again.