Nine days ago I wrote about getting a solo project indexed on Google, Bing, and Yandex. Today's post is the uncomfortable follow-up: something in that same multi-language setup was quietly working against me the whole time, and it never once threw an error.
The setup
DukoTools supports 5 languages: English, Spanish, Arabic, French, Urdu. 112 tools. A language switcher in the header. hreflang tags on every page telling search engines "here's the Spanish version, here's the Arabic version" of whatever you're looking at.
I assumed that if a page existed at /ar/tools/some-tool, it meant the Arabic translation existed too. That assumption was wrong for 22 tools, and I only found out because someone left a comment on my last post.
The bug, in one sentence
