Create Custom Dictionary or Add custom Word in Dictionary for Site Collection SharePoint

Some times we have a requirement to add custom word in the SharePoint dictionary. Below are the steps to add your custom word in SharePoint Dictionary 

1.  Create a text file on your local machine and add each custom term on a seperate line, save the file as "Custom Dictionary.txt"

2.  Create a library within the root of the site collection, call it "Spelling"; upload your "Custom Dictionary.txt" file to the library

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Hope it helps!