(feat): Hashtags should support other languages.

Summary

Hashtags in languages other than English break once a special character is reached.

Mark Harding said "special characters are not supported"

Bill said "it will have to be rolled in when we start supporting more languages next year"

Steps to reproduce

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Platform information

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What is the current bug behavior?

(What actually happens)

What is the expected correct behavior?

(What you should see instead)

Relevant logs and/or screenshots

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Possible fixes

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