I never removed the backelite plugin, 0.3.7 is still in my server plugin list. What I did remove was homebrew’s sonar. Bakelite’s page has a sonar-swift.sh file that it tells me to run https://github.com/Backelite/sonar-swift
Also, I do have the language set in my sonar-project.properties file located in the same folder as my project and the run-sonar-swift.sh file.
sonar.language = swift