Find My Token used in an Email

Here is the backstory:
We use a third party to translate our emails, unfortunately sometimes the translations will come back with a translated token.
example: {{my.utm_campaign}} becomes {{my.utm_campaign_lang_es_ES}}

I want to delete these tokens, but they are in use.
Is there a way to find the emails that use these tokens so I can correct them and delete the incorrect token from the main folder?

Thanks