Dictionary adds a language automatically

In Spotlight, if I type something a word that does not exist in English but can be found in another language, then Dictionary automatically adds that language and shows me the translation. This is not a useful thing, it's a bug and it should be disabled!

Moreover when this happens the new language is not shown in the list of dictionary sources, so in order to remove it I need to add it first and then remove it.

Here are some screen shots:

* Typing a word into Spotlight finds a Dutch translation, even though I don't have Dutch as one of my languages:

* After selcting the Dictionary line in Spotlight and hitting Enter, I am in Dictionary and now Dutch appears as one of the sources:

* Open preferences, scroll to Dutch. These sources are not checked. If I check and uncheck one of them, the Dutch source will be removed from the bar.