Founders Library's Children's and YA Collection contains materials in a number of languages, such as Spanish, French, Ukrainian, and many others, as well as multilingual books.
To find non-English language titles in HuskieSearch, you could do a Subject Heading search. Example, Spanish language--Juvenile. Then, make sure to use the filter on the left side of the screen to limit by Location (NIU--Juvenile Collection--4th FL--Founders Library).
You can also search for a topic, then use the filters to narrow by languages.
You can also browse Children's and YA titles in a number of languages by typing in the term "ForLang" and then searching by Holding Call Number:
Then, if you wish, you can also narrow by specific Language using the filter on the left side of the screen.