Language spelling menu switch I understand that Mac OsX should recognise the language automatically - and to say the honest truth - it does but... on rare occasions I need to see which language in"ON" and what are the choices...

Menu indicator-switch would be of great help - maybe an extra function to the keyboard indicator would solve the problem.

I use 4 languages in many programs...
One way to maximize the ease of changing the spellcheck language is to use an app which allows you to synchronize the keyboard layout and the spellcheck dictionary.  I think both Nisus Writer and Mellel have this feature.