If you spot a typo or mistake in one of our official Memrise-created courses or a community-created course, you can report it via our Community Forum's 'Language Quarters'. Once you're there, look for the relevant language and the course's title.
Then add your message to the existing thread so it reaches those responsible asap. If there is no existing thread yet for that course, you can create one. Make sure it's under the relevant language and that the title/subject includes the full title of the course. It's best to provide as many details as possible, such as the level and the item/word.
You can also access the forum by clicking the course's Forum button (present in web version only), followed by 'Language Quarters' > choose relevant language, search for existing thread or create a new one.