I do it all the time and yes the spell check is set to automatically detect.

There are few settings you have to do in syst preferences -keyboard like this.

![spell][1]


If you need a different keyboard layout (characters) then set it up again in system preferences by adding that language so you can easy switch by clicking on the icon in the menu bar.

![leng][2]

Not all language spelling are installed by default, so if yours is not a part of:

![spelling][3]


you can add it following this instructions: http://apple.stackexchange.com/a/11842/46541

  [1]: https://i.sstatic.net/eb1ou.jpg
  [2]: https://i.sstatic.net/HoQeS.jpg
  [3]: https://i.sstatic.net/UIuUp.jpg