Yes, absolutely, every Miss Universe hopeful should communicate in the language she can express herself best. It wasn't irregular at all for Miss Columbia and Miss Ukraine to answer in English and then segue to their respective native languages; why should they consciously and deliberately withhold the fact--and the asset--that they are at least bilingual? As for a Filipina participating in that contest, I don't see the wisdom of speaking in Filipino in the interviews particularly if she isn't fluent in Filipino in the first place. If she isn't fluent in English either to the point of just bungling it, for clarity's sake she should just speak in her own regional language instead--Ilokano, Pangalatok, Pampango, Bikol, Cebuano, Waray, Tausog, or whatnot. She would just add another wrinkle to the Babel of languages in that international beauty contest, but that's precisely the heavy, embarrassing price of not having enough mastery of both Filipino and English but having the vaulting ambition to show her wares and communicate her thoughts to a global audience.