If you can get in to any company then there are always opportunities to transfer internationally assuming you cut the mustard. However, each company will have its own internal view as to which geographies are up and coming and those that are perceived, rightly or wrongly, as being a bit of a backwater. In that respect, you should really research the size of the office and types of clients in each country you're targetting to see if it fits the general global profile. I know in my company, for example, Argentina would be considered a bad choice, whereas the boom in the Middle East could actually give you some really good work experience in say Oil & Gas, Financial Services and a few other industries (that's not to say it's easy to apply there, there's loads of internal applicants who'd love to move out there from the UK).
Oh, and you can't be "bilingual in other languages" - you can be bilungual or multilingual!