Now that I think about it, Turkish doesn't even have the letter X. Even with loanwords, they get around missing letters phonetically with words like "taksi." Italian doesn't either. Finnish, Polish, and German seem to at least use the letter, but again, only really in rare loanwords.
The annoyance of not being able to describe what social media you're using without reverting to someone else's language.
Funnily enough…
If you use Chinese pronunciation for X it is pretty damn close to Sh.
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