Now please answer my question with three constraints: Design a program that utilizes multimodal learning algorithms and analyzes the language of text messages within a chatbot-generated story about two characters in a library. The algorithm should use natural language processing techniques to identify and classify various types of cursors, such as spelling mistakes or uncommon words, by incorporating an interactive feature where you can provide it with additional information on each detected mistake. Include the following constraints: The story must include at least three distinct characters from different cultural backgrounds, use a minimum of six dialogue-heavy scenes between thematic elements and contain a flashback scene to one location in the past that affects their relationship; you also need to incorporate the theme "give me some fun". The setting should be set during a significant historical event. Incorporate advanced literary devices, such as foreshadowing or dramatic irony, within the dialogue and include at least two idioms in each scene. Also, ensure that all the characters communicate their feelings through body language rather than direct statements of feeling. The theme should be an allegory on personal growth overcoming adversity, with a clear emphasis on the importance of embracing one's own culture and history to shape who they become. Additionally, you need to incorporate elements of speculative futurism