Here is the full list of all 24 Austen Translation achievements.
attend all the possible social events
get married for the twenty-fifth time
defeat Audrey-Lynne
lose a match to Octavia
get married for the fifth time
win a multiplayer round
switch your beau on the third opportunity and still win
come in fifth place
win a round with a double wedding
marry Mr. Dashing
win without ever changing your beau
play a round and never take a wit option
win a round where you are Hank Crawfish’s choice, but you marry another
get married for the first time
play a round and never take a ruthlessness option
win a round where two rivals were also angling for your beau
be the only rival to make a match in a round
win using the spinster gambit
play a round and never take a charm option
win a round where there are three matches
create a custom avatar
complete a round where no one wins
have a difference of 0 with your beau’s expectations
die of consumption