Given that the article mentions many library implementations in Java, that puts JVM languages on the table. While Scala may be a good one, which the article mentions, that also puts Clojure on the table as well.
Just added clojure to the query to see what it gives. You can do it too, simply follow the link I give in the article. Closure is a bit less popular than Julia, hence not significant at this point. See https://www.indeed.com/jobtrends/q-python-and-%28%22machine-...