Add language tracker (By Joe)

[RamyAlshurafa]

Issues this PR relates to

the original PR is https://github.com/yalla-coop/universal-credit-support/pull/282 but opened into the wrong repo

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Any info the reviewer needs to know to test

e.g. Add env vars, run npm install

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Any info the team needs to consider before merged into development

e.g. Will a database need to be rebuilt (and is this ok if existing data), add env vars

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[thejoefriel]

Don't need to merge