Not at the Miami Airport, where all announcments are first made in the Majority Language then English.
We should not allow any other language or signs or whatever in anything but english. My grandparents were immigrants, who spoke no english when they came to he US in the late 1800's, they learned english and forced their 8 children to do the same. English was produly spoken at home by the old folks for their entire lives. So why have we incurred the costs of Bi Lingual everything here, you won't see that in Europe by the by.