From a patch applied to the Debian package.
--- a/speller/en.aff
+++ b/speller/en.aff
@@ -1,5 +1,5 @@
SET UTF-8
-TRY esianrtolcdugmphbyfvkwzESIANRTOLCDUGMPHBYFVKWZ'
+TRY esiaénrtolcdugmfphbyvkw-'.zqjxSNRTLCGDMFPHBEAUYOIVKWóöâôZQJXÅçèîêàïüäñ
ICONV 1
ICONV ’ '
NOSUGGEST !
@@ -14,7 +14,7 @@
From a patch applied to the Debian package.