Additional spell-check dictionaries are available at:
Download the language dictionaries you wish to install in RootsMagic 4. You will need to open the zip file and copy and paste the contents into the RootsMagic 4 program file. You can also just extract the zip file into the program folder.
Once the additional dictionaries are in the RootsMagic 4 program folder launch the RootsMagic 4 program. To make changes to the spell-check dictionary you will need to open a note and miss-spell a word, so red wiggly lines appear beneath it.
Right click the miss-spelled word and select: Spelling...> Options> Language > select all the additional dictionaries you would like to use. Then click OK and close the remaining windows.