I figured out why Lino Lakes passed its "English-only" ordinance. It has no sister city. I went to its web site, http://www.ci.lino-lakes.mn.us, and searched for "sister city" and "sister cities". No find.
If they had a sister city or two, they probably wouldn't improve their language skills any more than a few have in Duluth (with Växjö, Sweden; Petrozavodsk, Russia; Ohara-Isumi City, Japan; and Thunder Bay, Ontario). But at least they might have increased their tolerance for people speaking other languages.