If I try to replace î by i (Modern French) in the article name of https://support.mozilla.org/fr/kb/maitriser-editeur-groupe-onglets, I get an unexpected error.
It's also applicable when adding an accent: E by É in https://support.mozilla.org/fr/kb/ecouter-radio-firefox-os
Summary: Unexpected error when trying to remove an accent in an article name → Unexpected error when trying to remove/add an accent in an article name
I found a workaround: replace the word with a completely different word then with the word with or without accent.
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