I'm glad you were able to resolve the libreoffice issue by installing hunspell-en-gb. The fact that Featherpad isn't picking it up is likely a Featherpad issue that you should report to that project.
I'm glad you were able to resolve the libreoffice issue by installing hunspell-en-gb. The fact that Featherpad isn't picking it up is likely a Featherpad issue that you should report to that project.