Programming languages are just as much social/cultural constructs as spoken ones. The language's technical merits are just one factor. Sometimes, a bigger factor is the community which uses that language.

Choice of language makes a difference in productivity to your team, but in many cases, this will be swamped by other factors, like how experienced and knowledgeable they are and how well they work together.

Then again, there are highly specialized domains where a language will make you 100X more productive than another.