Ensure translations work as expected (#11049)
* add locale normalisation to work with browser locale
* add changeset
* tweak type
* add changeset
* add common key mapping to allow translating common backend values
* type fixes
* add changeset
* tweak
* tweak
* whitespace
* whitespace
* add i18n story
* add changeset
* add changeset
* add run for testing
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Co-authored-by: gradio-pr-bot <gradio-pr-bot@users.noreply.github.com>
