The reader may disagree with the recognition of numeral as a pictorial language and consider it a written symbolic language. If you are in disagreement, complete this short calculator experiment. The verbs are order, sort, group - anything one does with things and anything one does with groups of numbers. The importance of the placement of the numeral with the pictorial languages is that it recognizes numeral as a language which is less sophisticated than the written or verbal language groups and more sophisticated than the concrete group. Consider this last point in defense of this language and its placement.
Many people consider a numeral a number.
To them, a number is a thing as concrete as a dog or cat. To them, a number is not an idea. They do not speak formal mathematics. Numeral is their concrete and symbolic mathematics language. Here's a little quiz - a warmup for the next activity.