Sometimes you have to write a document in OpenOffice.org and you want to correct it with the spellchecker, but when you click on  button it doesn’t even work, not matter if you have set your document’s language to English from Tools > Options > Language Settings > Languages,  as it’s shown here:

This happens because you don’t have the dictionary installed on your system. In order to install it, just type

aptitude install myspell-en-us

Another language

If you want to add support for another language then just put the language code to “myspell-” word. For instance, in order to install the Spanish dictionary it would be:

aptitude install myspell-es