FortressForever_english.txt -- to the new hints the NeoNL made ages ago
FortressForever_brazilian.txt -- added new hints/descriptions only
FortressForever_spanish.txt -- added new hints/descriptions only
Necessary for fortressforever/fortressforever#250
* gameui.txt does not need any of the base SDK strings; those will still get loaded from the SDK language files (side note: the main menu strings *must* be in gameui.txt)
* Removed unused GameUI_GameMenu_FortressOptions string from FortressForever_english.txt