When it's an event covered by different sources, it's better to find a version in English.

When there is an official translation, it's better to post the translation.

But sometimes there is no English equivalent :(

I remember very few post that got traction in other languages, like "Homer in CSS" in Spanish, or a very strange custom keyboard in Japanese. It has to be very unusual, extremely good and have a strong visual component.

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From and old comment by dang:

> We have deep respect for other languages but HN is an English language site, so the articles posted here need to be in English.