Original Description:
Just like the name says, what you have to do here is group languages. Each row shows a different language, and gives you the word for one, two, three, heat, eye and tooth in that language. You have to use these clues to group together languages that are most alike.
To move a row, just grab it and drag it wherever you want. When you think you have everything grouped, click the button in the lower right to see how all these languages really compare.