Here are two oversized books that feature languages from around the world.
The Hello Atlas by Ben Handicott and Kenard Pak is a very cool look at language from all over. It is remarkably comprehensive (while, of course, not able to be complete) and a rich reading/looking/listening experience. (That last is because it comes with an app.) Each section begins with a map showing the languages highlighted, provides brief text about them, and then come a series of illustrations for representational children saying something in their language.
Hello World by Jonathan Litton and illustrated by L’Atelier Cartographik is an oversized board book featuring a handful of languages from different continents. Large double-page spreads are provided for Europe, North and South America, Asia, Africa, and Australia/Oceania. Fun lift-the-flaps provide tidbits of information and pronunciations. While definitely fun and worthwhile adults should discuss with child readers those images that are stereotypic.