When I am adding more words in the dictionary by using the following spell check file ( C:\Users\<user>\AppData\Roaming\Microsoft\Spelling\en-US\default.dic), the words are not recognized by the spell check in the store app when the file size exceeds 1 MB. If you add the same words with 1Mb file size in the MS-word custom.dic then it is working fine. why the window 8/8.1 store app is not recognized if the (default.dic) file size exceeds 1 MB. is there any solution to overcome this issue in the windows 8/8.1 store app?