Regarding O and X, maybe just include those two without the "button" part, but scrap the rest of the controller/keyboard category.
Remove:
{In what order shall we use our weapon skills?} - Most people don't even know what a skillchain is anymore
{Heal!} or {Healing!}
{Reward} or {Reward:}
{Setting Home Point}
{Mercenary Assessment}/{Mercenary Rank} - Maybe even both
Ballista related stuff in Game Terms, except {Ballista}
Maybe the whole Race catagory, people can abbreviate these like TT, HM, GK etc
Settings & Setup... - {Filter}, {Patch}, {TV} (esp TV, it's the same in every language)
Add:
Was said, {Abyssea} and {Dynamis} would save on spaces for auto translate stuff. Add {Walk of Echoes} and {Provenance}. Keep spaces reserved for Adoulin.
Spells/JAs/Avatars are a given.
Was never actually included: Relic Weapon Skills and Empyrean Weapon Skills.
Game Terms: {Atma}, {Voidwatch}, {Curor}, {Dominion}, {Fields of Valor}, {Grounds of Valor} at the least. Don't really need {Bastion} if your trying to conserve space, depends on what the devs plan to add with Adoulin.