The export-to-language plugin uses a package called 'javascript-stringify' to create a string from the query, which is passed as a javascript object. 

The issue is that it doesn't stringify it correctly, which is causing the compiler to try to compile a string that doesn't make any sense. The solution would probably be to pass the original query/agg string instead of passing the object that is created from the string. Alternatively, could write a stringify method within the plugin that works correctly.