I’m using spring boot to embed the engine but also the webapps and rest services.
However, I’d like to be able to add more languages and change logo, colors, etc…
all webapps related files are located in this artefact: org.camunda.bpm.webapp:camunda-webapp-webjar:jar
This Webjar file is pulled in by the Spring Boot Starter, that you’re using, as a transitive dependency. I would say that you can make some magic with Maven to add/replace required files in it. E.g. look at this