Internationalisation (i18n)

[daveearley]

Preparing the backend and frontend for i18n.

[github-actions]

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I have read the CLA Document and I hereby sign the CLA

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1 out of 2 committers have signed the CLA.
✅ (zarevskaya)[https://github.com/zarevskaya]
❌ @Romerolweb
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