Is Welsh language causing Gmail to mark email as spam?

Gmail has pulled a bilingual email up as spam (other filters ok). As Gmail doesn't give reasons I can only guess. I wonder if it is because of Welsh language inclusion. Can anyone help?
The link to the spam report page is:
Welsh is included alongside English. Could the header "naughty little dessert" be causing an issue?
Thank you in advance!

roshodgekiss roshodgekiss, 5 years ago

Hey there, Mory! Sorry for taking so long to respond to you here. We haven't heard of foreign languages like Welsh specifically tripping off Gmail's spam filter test, but it does tend to be very finicky.

I noticed that you sent the campaign last week and no bounces were recorded from Gmail subscribers, whereas there were numerous opens from this domain. My guess is that the filter in the test may have been a bit overzealous, so we're going to continue keeping an eye on it so it doesn't create anxiety when it shouldn't be. Sorry about this!

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