A comment on the disussion page is often not enough.
After spending a lot of time in the Wiki recently it was really surprising to see how many errors there are when it comes to spelling and to using British English even on well established tags. And some of then are just REALLY obvious like vending=news_papers, which comes from this proposal 8 years ago and just one person pointed it out.
The reason I post this is because I just saw the other diary entry about sport=beachvolleyball...Those errors are more common than people think and become more difficult to fix for every day that goes by.
Even more important if you notice that AE was used, because a lot less people will realize that. For example shop=jewelry is AE and while pointed out on the page itself as well as the talk page nothing happened. What makes it even better is that craft=jeweller is mentioned twice on the same page.
In some way this is also a follow up to my last diary entry: Please create Wiki entries for Tags!, because for example as pointed out translation errors can become a lot more obvious if you put a image next to them or just looking for an image you might notice the spelling is wrong.
PS: Obviously everybody should act when realizing a tag is wrong, but many errors will probably not be noticed on the spot by non-native speakers, especially AE vs. BE.