Just out of curiousity...

In our application I list all the available translations in the following format "NativeName - EnglishName". For some languages the NativeName isn't capitalized eg.

"Deutsch - German"
"español - Spanish"
"français - French"
"italiano - Italian"
"Nederlands - Dutch"
"polski - Polish"

It's no big deal to capitalize the first letter, but what is the reason behind this?

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