Yes, being able to speak different languages certainly opened a lot of doors and opportunities for me especially here in South East Asia. Being bi-or tri-lingual were requirements since I was working in an international environment.
In my first job I was expected to be a fluent French speaker (and having lived in France was a huge boon). In my second and third jobs, I was expected to be a fluent English speaker and was expected to be able to write articles and copy in English. The French came in very handy, too. Most recently, it was huge bonus being able to speak Italian to Italian factories, and French to French ones in addition to my design background. It minimised misunderstandings and just speeded up the whole process. Frustration levels went down considerably (except for me since they were giving me more and more responsibilities).
Right now I have to hone my Indonesian again, so it's kind of back to square one again for me LOL! I can write an article in probably a few hours were it in English but currently in Indonesian it's going to take a couple of days.