The tag alias #78233 french_fry -> fries is pending approval.
Reason: The tag french_fry is sometimes used instead of fries, especially for images that contain only one fry. Although not strictly correct in those cases, it makes sense to alias to the plural form since it's tagged more and fries are usually referred to in their plural form.
Tag history:
https://e621.net/post_versions?commit=Search&search%5Btags_added%5D=french_fry