[dev-context] Font key for \language

Hi Hans, the processing of the font key for \language doesn’t work because \feature takes the value as an unknown argument. \appendtoks \edef\p_language_font{\languageparameter\s!font}% \ifx\p_language_font\v!auto - \feature\currentlanguage + \doaddfeature\currentlanguage \fi \to \everylanguage Wolfgang