# What dictionary is used on MSE?

When I type here what dictionary does the spell checking for me? My local browser dictionary or is it MSE dictionary?

I was using Chrome while typing in the question box. The word differentiable was flagged as having wrong spelling. When I typed the same in the search box of Chrome no spelling error was indicated. So I suppose two different spelling dictionaries are used.

That might suggest uses for a dictionary of mathematical words which are not in basic dictionaries.

• In the interest of teaching you how to fish: try typing some nonsense in a text box, right-click on whatever is underlined in red, and note the entries in the popup. – J. M. isn't a mathematician Jun 8 '13 at 16:25
• As far as I can tell, MSE doesn't have dictionary or spell checking functionality. Whatever you have is something provided by your browser. – Ayman Hourieh Jun 8 '13 at 16:47
• I was surprised to see differentiable flagged in my Chrome when I type it here but not when I type in the search box of browser. I guess I still don't know how to fish! Then I thought perhaps there can be an additional mini-dictionary of mathematics terms to add to the local dictionary. – Maesumi Jun 8 '13 at 17:21
• I don't believe Chrome (or most other browsers I've used) does spell-checking in search boxes. You can type any amount of nonsense in there, and you'll not see the red squiggly line at all. – J. M. isn't a mathematician Jun 8 '13 at 17:26
• @Ｊ.M. We must be talking about different boxes. Mine does plenty of red squiggly when I type a word with the wrong spelling. On my page there is Google logo on the left, a search box with a microphone picture in it, and a magnifier outside of it. – Maesumi Jun 8 '13 at 17:45
• Hmm, the checker must have been enabled in yours; it's disabled in mine by default. – J. M. isn't a mathematician Jun 8 '13 at 17:48