How can the language name be changed?
Fragment of a discussion from Support/LiquidThreads
In general, those language names are handled by CLDR. However as I checked Locale Data Summary, there's unfortunatelly no Gothic locale available.
If by filling this thread you mean that those should be shown in Gothic, please first file a new ticket (ask @Amire80: if you don't know how to submit it).
If you visited a site in other languages, and saw that name is shown wrong, can you provide which language were you using in that time?