Apache Groovy has some long-standing governance issues, e.g. the groovy-lang.org DNS is owned by a single individual. Other languages such as Kotlin and Scala have more, er, responsible governance.
If Groovy rocks your world, wait until you meet Kotlin...
If Kotlin rocks your world, wait until you meet the Scala.
I met Scala a few years ago, we had some fun together but she's way too high maintenance.