If I could only learn one additional language, and I wanted to travel the world, what language would serve me best other than English or Spanish?
Kinda surprised that no one has mentioned sign language. I feel that it’s use cases expand outside the original intent, especially if other people in your circle understand it.
But OP was asking about travelling the world. Sign language wouldn’t help with that.
Sign language isn’t one language. There’s American Sign Language, British Sign Language, Australian Sign Language, Nigerian Sign Language, etc.
American Sign Language and British Sign Language are completely unintelligible to each other.
Basically every country has their own sign language or an imported sign language that became standardized.
But learning any sign language will make it a lot easier for you to communicate with signers of any sign language. Not because they’re necessarily similar to each other, but because sign language varies a lot regionally anyway (and even locally depending on what method of signing you’re taught) and it will be much more natural to find ways to work around it and communicate with each other.
