Change language being spell-checked in Textmate

In OS X applications such as Mail and Firefox you can right click in a text field and change the language being spell-checked. I can't figure out how to do the same in Textmate. Can it be done easily, and if, how?

How do you add a language to spell check?

On the Review tab select Language > Set Proofing Language. Select the language you want to use. Select OK.

How do you change the spell check?

Here's how. Click File > Options > Proofing, clear the Check spelling as you type box, and click OK. To turn spell check back on, repeat the process and select the Check spelling as you type box. To check spelling manually, click Review > Spelling & Grammar.

Press ⌘: (it's a shortcut to Edit, Spelling, Show Spelling and Grammar) and change the language in the dropdown.

To update the error highlights on the active file, press ⌥⌘; twice to turn Check Spelling as You Type off and on again.