I don't believe he got a time extension because he didn't declare it. I don't know why he didn't choose to take the papers in Spanish. I presume he could..
He wouldn't have got a time extension because the exams are available in Spanish. If they are available in your language, but you choose another language, then no time extensions are available.
Often people study in English so prefer to stick with that - I then ask for them to get two sets of exams - the English and their native language. They can then use the English primarily, but can use their language version as a dictionary to clarify any confusing wording in the English exam as needed.