INSPIRE View Service
map.apps SDI supports INSPIRE view services.
If you want to request your INSPIRE view service with the correct language parameter, you need the bundle sdi_inspireviewlayer.
If you use "type": "INSPIRE_VIEW" instead of WMS the parameter language with the language of your app is added to the service request.
For example language=eng if the app is running with the parameter lang=en.
If you load a service dynamically and choose INSPIRE view service, the language parameter is added to the service request also.