Please see bug 1334960 and bug 1364114. There is a typo in fonts-tweak-tool/po/lt.po (Lithuanian translation): "Plural-Forms: nplurals=3; plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && (n%100<10 or n%100>=20) should be ("or" is considered to be an identifier by gettext): "Plural-Forms: nplurals=3; plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && (n%100<10 || n%100>=20) Please fix Plural-Forms headers (s/or/||/).
fonts-tweak-tool-0.4.3-1.fc28 has been submitted as an update to Fedora 28. https://bodhi.fedoraproject.org/updates/FEDORA-2018-accab018f0
fonts-tweak-tool-0.4.3-1.fc28 has been pushed to the Fedora 28 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-accab018f0
fonts-tweak-tool-0.4.3-1.fc28 has been pushed to the Fedora 28 stable repository. If problems still persist, please make note of it in this bug report.