In Application Setup - LIBRARIES, you'll find many different options to create re-usable elements for all your events.

Dietary Requirements

Here, you can set up a library of dietary requirements. You can choose a list for your event, and ask attendees to select from the list during online registration (or you can manually assign dietary preferences in the Attendee Panel). These requirements can be reported on and shared with food and beverage vendors in reports or through the Dietary Requirements Portal.

Amenities

You can set up amenities and facilities that can be associated with hotel suppliers. These are for your internal reference and appear in the Global Hotel Set Up report under Supplier Reporting.

Hotels & Suppliers

Preferences - Turn on Brand & Chain functionality here.
Brand & Chain - Set up global Brands (e.g. Hilton, Best Western) here, along with their various chains that fall under that brand.

Tip: When setting up a new hotel for your event in Hotel Setup, you can press Add From Library, and search for this brand. Selecting the brand will pre-fill your new Hotel entry with all the details of the hotel (e.g. address) you've set up here.

Supplier - If you use the same suppliers (hotels) across many events, set up details of their usual room types here. You can press Add Standard Rooms to easily add the room types you've already configured under Room Types.

Room Types

Create standard, re-useable Room Types that can be linked to your global Suppliers.

Currency Library

This library is used when you plan to open registration to attendees paying in different currencies. Here, you can create a library of different currencies you plan to use, and assign the default currency symbol for each currency.

Note: The currencies you want to select for use in each event, plus their Exchange Rates, will be set up at a per-event level, in Event Currencies and Rates.

You will create specific currency libraries within a specific event, including the estimated exchange rate.

Language

English is set up as the default language.

However, you can also define master language translation tables that can be applied to the following:

Interactive Sites
Merge Docs
Attendee Apps
Organizer Apps
Portals and Apps found in the App Store

For each of those, you can define translations for specific sections, or the whole feature. The translation table has the Original Text in EventsAir on the left, and you can add your translation or change into the right-hand column.

Language can also be localized within your event - read more here.

Under the Advanced tab in each Language in the library, you can add the ISO code for the language, which may be needed if your attendee is using assistive technology to navigate your site or app.

Countries

You can create multiple Country Lists in Libraries. You can also copy an existing list to use as a base.

Country lists support UTF-8 characters (e.g. Asian languages, Arabic, etc).

The 'Default' Country list is already in your library.

To add a different Country List, use the + symbol to create the Country List name.
Select the new list name (under "Countries Library", then add/edit Country names as needed.
You can also add/edit state names (some countries such as United States and Australia already include these in the default list).

Country Lists are referenced in your event by these features:

If you only have one country list, this will be added by default to all your events.

If you have more than one country list, you’ll be prompted to choose the correct list when you set up your event.

Event creation / Event Preferences (Setup Panel) - You can also change the country list selection later (but that may cause problems if you've already set up other features/modules that reference the original selection).
Interactive Site & Contact - Only countries from the list selected for that event will appear in drop-down menus. States will appear if included for that country in the Country List in the library.
Office, Contact, Presentation Affiliation, Accommodation (hotel), Supplier: You can also add a country using the drop-down menu if it doesn’t already appear in the list.