I can certainly understand why you'd be concerned and wouldn't want you to worry about your friends while here.
One option to help ensure that they'll be able to find help whenever they need it is to look into a tour guide.
There are a number of tour guides available who offer Spanish speaking services, including flexible tours and options that I do hope your friends would love. What I'd suggest is reaching out to the Independent Tour Guides Association, or the ITGA
, to see what they might suggest. The ITGA is an organization that helps tourists find the perfect guide for their trip. You can search for tour guides by location, language, and even tour type, to give your friends the most flexibility possible.
There are also a number of tour operators who offer services in Spanish. For example, both Ole Irlanda Tours
and Irlanda en Español
offer these options for Spanish speaking individuals.
I do hope that this helps!