When developing an extension is there an reason other than simply "Best Practice" to include a
en_US or extension base language translation file?
I write an extension with some text where the default language is English. I then translate this to say German and Swedish so I obviously include these two as translation files but should I really include a "native" language file which would have an exact match of string and translation. e.g
"My cool text","My cool text"
Maybe this question may seem a bit like a personal opinion.