What is the language of this song (details inside)? Dutch?

Here are the lyrics of the song:

http://www.lyrics007.com/Lais%20Lyrics/'t%20Smidje%20Lyrics.html

I understand that a group named Laïs originated this song in 1998, and later a dance was done to it that is very popular in Europe. Here is a video of a flashmob doing the dance:

http://www.youtube.com/watch?v=0yil398NujU

What is the language of the song, and how do you pronounce the the title, ‘t Smidje? If you can give me the proper pronunciation in IPA symbols, so much the better. And is the ‘t some kind of definite article?

Thanks, and pardon my ignorance.