They should learn Mandarin Chinese, Japanese, or German. At least it would give them an advantage in a white-collar job.
But that would not provide easy, non-results-oriented-jobs for unqualified "bilingual" hispanics.
When your workers say "pinche gringo" don't you want to know what it means? People from other countries make an effort to learn English but we've got millions coming over now who have no intentions of learning English --- it can be helpful to know what they are saying --- but it doesn't mean you have to speak a foreign language in your own country.