备注：excuse sb from doing sth同意免除某人做某事/同意某人免做某事

I cannot excuse you from attending my classes.我不能允许你不听我的课。

She excused herself from attending the meeting.她请求不参加会议。

She was excused from giving evidence because of her age.因年龄关系她获准不予作证。

回到网友提供英语句子分析如下

Learning to apologize in another language【主语】// does not excuse【谓语动词】 //speakers 【宾语】//from practicing the same good manners in their mother tongue【状语】.参考译文:学习用另外一种语言道歉不是免去说话者用他们的母语(本国语)去练习/实行相同的礼貌/礼仪。

备注：网友提供英语属于“双重否定”表示“肯定含义”excuse speakers from doing sth同意免去speakers做某事，加了doesn’t 就表示“不同意免去speakers去做某事”；就表示“肯定含义” 换句话说：学习用外语道歉并不意味着不能用母语去道歉。(即外语和母语都可使用)