Para openSUSE Tumbleweed execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:edogawa/openSUSE_Tumbleweed/home:edogawa.repo
zypper refresh
zypper install gtkspell3
Para openSUSE Slowroll execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:edogawa/openSUSE_Slowroll/home:edogawa.repo
zypper refresh
zypper install gtkspell3
Para 15.6 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:edogawa/15.6/home:edogawa.repo
zypper refresh
zypper install gtkspell3
Para 15.5 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:edogawa/15.5/home:edogawa.repo
zypper refresh
zypper install gtkspell3