How can I make a spellchecker for a language that is not currently available in LibreOffice?

I would like to make a spellchecker to use with the Hunspell system that LibreOffice uses. The language is not currently known to have a spellchecker yet in any program, but there is a dictionary file that can be used to create a spell checking word list. The language does not have a localization, and I am not interested in that at the moment, just spellchecking. Can anyone point me in the direction of the first step to take? Or could you lay out the steps for me?

You will have to study the documentation of hunspell dictionary files. This link is a good start: Ubuntu Manpage: hunspell - format of Hunspell dictionaries and affix files