8 of the 9 textures the mod includes are used for the directional buttons for the language selection screen. However, all of these are direct duplicates of existing Minecraft textures.

• assets/minecraft/textures/gui/sprites/transferable_list/select.png
• assets/minecraft/textures/gui/sprites/transferable_list/select_highlighted.png
• assets/minecraft/textures/gui/sprites/transferable_list/unselect.png
• assets/minecraft/textures/gui/sprites/transferable_list/unselect_highlighted.png
• assets/minecraft/textures/gui/sprites/transferable_list/move_down.png
• assets/minecraft/textures/gui/sprites/transferable_list/move_down_highlighted.png
• assets/minecraft/textures/gui/sprites/transferable_list/move_up.png
• assets/minecraft/textures/gui/sprites/transferable_list/move_up_highlighted.png

Using the existing transferable list textures would increase consistency and make it so resource packs that already change the vanilla ones change the mod's buttons, too.

These textures are actually different. I'm not going to use the vanilla ones