Hi Xee_12,
We'd like to help guide you in the best direction to help you find a solution. We recommend seeing if this is specific to one email provider, and test this with additional email accounts added to the device. For example, if you use Gmail, try another email client that is not Gmail. This will help further test and isolate the issue. If this becomes isolated to one email client, reaching out to them will be the next best steps.
If this happens with several email accounts, we recommend making sure the device is on the latest update, and you can follow steps here on how to do so: Update your iPhone, iPad, or iPod touch. If you continue to have an issue after these steps, and checked to make sure all settings are correct here: Change the language on your iPhone, iPad, or iPod touch without any success, you'll want to reach out to Apple Support. You can use the link below, if needed.
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