Although this question has an accepted answer but I think this is a much cleaner way to achieve the desired output
<select required>
<option value="">Select</option>
<option>English</option>
<option>Spanish</option>
</select>
The required attribute in makes it mandatory to select an option from the list.
value="" inside the option tag combined with the required attribute in select tag makes selection of 'Select' option not permissible, thus achieving the required output