Translation of mousse in Spanish

What do we do about the numbers? I skipped them because I wasn't sure. Because it is possible that somebody wants to know how to say 15 in Spanish. He should write out the word as 'fifteen', not as digits.
I would also need to know whether pricing can be different, because otherwise that amount would be too high. Some of the translations are not accurate at all and would also need corrections so that the dictionary displays only correct words.
It's very good that you can learn English with the help of technology (Internet), I think you'll learn quickly. Although I am now getting better, I feel the improvement. But once again I lack vocabulary.