(Tutorial by desga2)
1. Download dictionaries that you like from some Mozilla web page:
Right click and Save target as zip file.
Unzip file in a temporal folder and move the files "en-US.aff" and "en-US.dic" to a K-Meleon subfolder named "dictionaries"
2. Download the spelltest kplugin from K-Meleon Extensions Central:
Unzip the file in a temporal folder and then move the folders into K-Meleon instalation folder.
3. Setting SpellChecker to enabled it in Preferences (F2) -> Page Display -> Languages