We work all around the world, and the team is made up of members from many countries. Almost everybody speaks some English, but at its core, this is a French Team. Around the dinner table, during work, discussing plans, and writing reports, French is the main language you will hear.
But if you stroll around the deck after a long day of diving and a fine dinner, you could easily encounter small groups here and there talking in Arabic, Spanish, Russian and Tagalog, as well as English and French.
And because many us have worked in so many of these countries over the year, you could absolutely hear some people speaking in English, French, Spanish, Arabic, and Tagalog, in the Same Sentence!
As we are always trying to learn new languages, or improve on the ones we know, study and practice are important. I like to follow the advice of Benny the Irish Polyglot. He speaks 12 languages ( and counting!) and has great tips on language learning. Here is his website;
http://www.fluentin3months.com/