Yes, but that goes both ways: choosing a popular language can be just as fatal as choosing an unpopular language.
If you're a "body shop", then choosing an unpopular language could be fatal, whereas if you're building a specific software product that needs to do certain things on certain platforms, then choosing the language becomes less of a popularity contest and more about how it can help you finish the product quickly with the highest level of quality and performance.
If you're a "body shop", then choosing an unpopular language could be fatal, whereas if you're building a specific software product that needs to do certain things on certain platforms, then choosing the language becomes less of a popularity contest and more about how it can help you finish the product quickly with the highest level of quality and performance.