14. The method according to claim 8 , further comprising setting an editing level representing the user's editing ability, wherein the presenting the one or more correction candidates presents candidates for action for the second difference string according to the editing level.
8. A content creation support method, comprising the following steps, when executed by a processor, performing a speech synthesis on a first text including an original string to generate a synthesized speech of the first text; performing a speech recognition on the synthesized speech to obtain a second text including a recognized string resulting from the speech recognition; extracting feature values by performing a morphological analysis on each of the first text and the second text, the feature values each including one of pronunciations of the original string and the recognized string; obtaining a first difference string and a second difference string by extracting a difference between the first text and the second text, to compare a first feature value that indicates one of the feature values corresponding to the first difference string and a second feature value that indicates one of the feature values corresponding to the second difference string, the first difference string that is a string in the first text including a difference from the second text, the second difference string that is a string in the second text including a difference from the first text; presenting one or more correction candidates according to the second feature value; and selecting at least one of the correction candidates in accordance with an instruction from a user.