What is the theme in The Real Thing by Tom Stoppard?

Another theme is language and meaning. Stoppard believes that language and meaning are open to interpretation. Words in themselves are "innocent," but they can have dangerous effects. Both Charlotte and Annie find Henry's incessant word-play oppressive at times, particularly when he becomes sarcastic. His tendency to rely upon irony and sarcasm becomes a mis-use of language when he uses these registers of humor to contain emotion and to create emotional distance a habit that is exposed by Henry's daughter. Henry's "growth" in the play hinges upon finally being able to express emotions in the everyday language of the heart. As Frank Rich said in the New York Times, Henry struggles to "find the language that celebrates love."