Other types of pants are specified using adjectives: shorts will be pantalones cortos and jeans pantalones vaqueros (also valid in their singular forms). As in English, you can use the plural form to refer to one item, and you can also use the singular form.ther types of pants are specified using adjectives: shorts will be pantalones cortos and jeans pantalones vaqueros (also valid in their singular forms). As in English, you can use the plural form to refer to one item, and you can also use the singular form.