Hi all!
Thanks to an amazing work of a bunch of individuals in the Scala community, https://www.scala-lang.org/ has now a language server (https://scalameta.org/metals/), VS Code has a plugin for Metals (https://marketplace.visualstudio.com/items?itemName=scalameta.metals).
Could Theia support Scala? 
[original thread by Kamil Kloch]
Definitely! We are transitioning from using the LSP to directly running full VS Code extensions. Not sure someone has tried the scalameta.metals extension already.
[Kamil Kloch]
Great news, thanks! Transition to full VS Code extensions \o/
[Kamil Kloch]
Thanks! I stumbled over this issue: https://github.com/theia-ide/theia/issues/4261
thanks, not all VS Code commands covered yet