With Chrome and Firefox I have the option to correct misspelled words in whatever language I have installed on those browsers. When I right-click on a misspelled word a small window will appear where I can chose the language I want to correct the word with. Opera does not seem to offer this option. Am on the latest version. Any help much appreciated.
you have to go to Settings ---> Dictionaries (in the Languages section) and add the languages you prefer. Then directly mark as Spelling language and you're done.
Every time you write something in text box you can choose the languages by right click the text field and change spelling language from there (Spelling submenu). Please note that iof you select a word and right click the submenu does not appear. In that case deselected the text and right click again..
hope it helps