I'm sorry, is this a serious question? I'm just amazed. We profess to be professionals and yet we do NOT know the basic rules in etiquette. I am from the Philippines and living here in the United States. Aside from English, I speak Pilipino and a little of Spanish. When I am in the workplace, I am very careful NOT to speak Pilipino (or Spanish) because i do not want to isolate other people and make them feel UNCOMFORTABLE. To put it bluntly, it is very RUDE to speak in our language when other people are around. I know that sometimes we get excited when we see a "kababayan" and we prefer to speak in the vernacular, but this must stop.