> No. Check if MozillaFirefox-translations-common is installed? yes all language are enabled. i found a solution i use this tuto to workaround the problem https://support.mozilla.org/en-US/kb/use-firefox-interface-other-languages-language-pack i found this intl.locale.matchOS true general.useragent.locale US i changed to: intl.locale.matchOS false general.useragent.locale fr but why and how general.useragent.locale = US ? also if i go to software.opensuse.org or another multilanguage site i get the english version