Language drop-downs as well as entity drop-downs in general should have a list of commonly used languages / recently used languages (as MB has) up front.

Having the 10 or some most recently used entities/languages/etc show up first in the searchable list would be extremely useful, and a massive QoL improvement, it becomes very tedious to constantly type/paste in the same language code over and over, especially so as each entity will need one for the title and once for the contents itself.