Hi!
Since 10.5.1 it´s possible to "import" Custom Widgets into a ArcGIS for Portal.
In the past we developed Custom Widgets in WAB Developer Edition.
Now I got a problem with the webappviewer - the application that starts the webappbuilder apps in Portal for ArcGIS.
I got different classes (not only the Widget.js) in the Widget and every class has it´s own language file.
The WEB Developer edition has no problem to load an language ressource with
"dojo/i18n!./nls/ExtraClass"<SPAN class="line-numbers-rows"><SPAN></SPAN></SPAN>
When I start the Widget in an app in the WAB of the Portal for ArcGIS the dojo load says: