Languages and slangs other than English have to use the touchscreen.
Yes they’ll get it worked out and already have experience with this change. They
announced the concept back in 2016.
snip
McDonalds announced that it would roll out digital self-order kiosks and table
service in all of its 14,000 U.S. stores. Customers will be able to order at touch
screens and then pick up a number with a digital locator, which will allow employees
to serve them at their tables. Next year customers will also be able to order and pay
on the companys mobile app, which has 16 million downloads.
Right now kiosks and table service are available in 500 McDonalds restaurants in
Southern California, New York, and Florida. Next up are Boston, Washington D.C.,
Chicago, Seattle, and San Francisco. Incoming U.S. president Chris Kempczinski
said choosing those cities was very purposeful since they are trendsetting markets.
http://fortune.com/2016/11/18/mcdonalds-kiosks-table-service/