`-ms-lang`'s parameter can be a comma separated list (e.g. `-ms-lang(am, ti)`). The parser fails to parse this rule: ``` css .my-page:-ms-lang(am, ti) { font-family: "Ebrima"; } ``` But it can parse this rule where `-ms-lang`'s parameter is just a single value. ``` css .my-page:-ms-lang(am) { font-family: "Ebrima"; } ```