The Wikimedia Foundation suffered a security incident today after a self-propagating JavaScript worm began vandalizing pages and modifying user scripts across multiple wikis.

Conjunctions join together two different, but related, parts of a sentence. They can be words like 'and', 'but', 'if', 'when', and 'because'. For example: I like swimming and she likes dancing.

The platform's chat filter can also recognize when abbreviations, numbers, or symbols are being used to express profanities.

Why are they so difficult? Often they aren't easy to translate, but even when there's a translation, it doesn't always apply, because English prepositions have lots of meanings and uses.