I would like to add suggestions. For exclamations and responses, say things like: Oh dear! Bless me! Fancy that! What the devil....and when a character is talking about their opinions, things like: I rather think...I quite like it....It was most (insert adjective here). In dialogue, use adjectives like frightful, dreadful, beastly, queer. Tell people things like "Do stop (insert verb here)!"