The main language spoken in the Philippines is Tagalog, belonging to the Malay language family (together with Malay, Indonesian, Hawaiian, Maori...). There are also many local dialects - but on Mindoro, Tagalog is standard.
They have another official language, English. Thanks to the American presence in the 20th century, as they reorganized the whole educative system. Nowadays, English is still learnt very early at school, and everyone who did studies will be fluent. Most people can at least speak a little English - apart maybe from some farmers or fishermen.
Spanish has been completely forgotten, I have not met anyone speaking it yet.

Tagalog also has many English and Spanish inserts, often phonetically retranscripted (ex: kalye for Spanish calle, meaning road, or kotse for coche, meaning car).

The writing is fully phonetical - WYSIWYG: one letter = one sound;

By hearing a word you can write it down and vice-versa, like in Spanish or in German.
Funnily, for counting, they use no less than 3 parallel systems, one in Tagalog, one in phonetic Spanish, one in English. They can use them indifferently for anything. It looks like the Spanish one is preferred for the time of the day ("a las doce").