We are investigating this issue. Some users mentioned this article was helpful https://metamask.zendesk.com/hc/en-us/articles/360016336611-Revert-Back-to-Earlier-Version-or-Add-Custom-Build-to-Chrome
Another option from https://github.com/MetaMask/metamask-extension/issues/11033
A potentially quick and semi-nontechnical workaround is to set your browser’s language to a different language that is Intl compliant, like en (English), then reinstall the extension. Be sure that your seed phrase is 100% accurate, since reinstalling clears all extension data.