What color is English?
If you've ever seen the mangled English written by foreign manufacturers in the owner's manuals, you see the dangers of transacting official government business in more than one language. Imagine the lawsuits and consequences when a statute is accidentally mistranslated, allowing citizen A speaking language X to do something however innocently that citizen B cannot.
The real goal of course is to print ballots in every language possible, which the DFL believes gives them an edge.