@Tony O'Hagan Welcome to Microsoft Q&A Forum, Thank you for posting your query here!
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Thanks for sharing your valuable feedback for Azure Translator. Please post this feedback and feature-requests in the Azure Cognitive Services feedback forum
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https://feedback.azure.com/d365community/forum/09041fae-0b25-ec11-b6e6-000d3a4f0858
Also users having similar ask or feature request can upvote your idea on that forum.
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Hope this helps. If you have any follow-up questions, please let me know. I would be happy to help.
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Please do not forget to "Accept the answer” and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.