Building an app for english language...

Hi…
I want to create a word game , when use submits a word , I want to check and verify just the existence of the word in english dictionary.

Any Idea how to do that? …
Is there any direct library support?
or
I have to keep a file with list of word?

I don’t know if you can do that in unity , I reckon you could call an external database online with a WWW function, although I’m not sure how this would work …

Any idea how the other word game apps are working?..

If using an external file is the only hope… then generic dictionaries will be helpful in getting words or not.

I guess they have a local database with words, maybe 500-5000 hand chosen words (with different lengths). When the letter grid is created, hand full of this preselected words are taken and put on the grid, rest is filled with random characters.

There are a lot of free word lists out there. You can shove the data into a hash table, or into a sorted List and find it with a binarysearch.

ftp://ftp.ox.ac.uk/pub/wordlists/
http://zyzzyva.net/wordlists.shtml

have fun