Diacritics break hashtags
See https://nitter.net/ultramarins bio
there is [#visibilit](https://nitter.net/search?q=%23visibilit)é instead of [#visibilité](https://nitter.net/search?q=%23visibilit%C3%A9) (twitter link: [#visibilité](https://twitter.com/search?q=%23visibilit%C3%A9&src=hashtag_click)).