Here are a few possible translations:
* തെറ്റായി എഴുതിയത് (thettaayi ezhuthiyaath) - This is a general translation of "misspelled" and can be used in most contexts.
* ശരിയായി എഴുതാത്തത് (shariyaayi ezhuthaathaath) - This translates to "not spelled correctly" and emphasizes the incorrectness of the spelling.
* തെറ്റായി എഴുതപ്പെട്ടത് (thettaayi ezhuthappettaath) - This emphasizes the fact that the word was misspelled by someone else.
The best translation will depend on the specific context of the sentence.