I'm always a fan of " one language solution with Java to rule them all ", here are sofar my opinions about Polyglot Programming: Why "Polyglot Programming" or "Do It Yourself Programming Languages" or "Language Oriented Programming" sucks? Warum Polyglot Programming nicht praxistauglich ist Java als universelle Programmiersprache Until today nobody can excite me about Polyglot Programming. My points are getting another big support after I read the " Rise of Polyglot at Netflix " presentation which says that Polyglot is expensive , also for company in the category of Netflix. At the end of the day we need to be productive . Our applications should have a high quality standard and the total costs (TCO) of our software development should be manageable and low . To be able to reach this goal we have Java with Spring Boot or JakartaEE on the server-side which offers REST interfaces. So logically for user interface development