Please also include information about your system in your question, e.g. which version of windows you have

It's obviously Win8 or Win10, but I doubt the version would help much here. Do you suspect it's a problem inherent in a specific version?

I'm not sure it is so obviously Win8 or Win10. In previous questions by the same person, we had screenshots from all kinds of versions back to XP. They got answers specific to the version shown in screenshots, only to then reveal that they don't use this version of windows. This was very frustrating for the answerer. The replies in the linked reddit thread also talk about various windows build numbers in which partial fixes are thought to be included, so knowing the version used by the OP seems essential.

I can't see the Reddit link, but the screenshot is clearly Win8 or Win10 UI.

A random screenshot from somewhere on the internet does not give us any information about which version the OP uses.

You still haven't given any reasoning for why the version is important beyond what's already evident from the image.

https://support.microsoft.com/en-us/topic/june-12-2018-kb4284835-os-build-17134-112-16f9a266-d39a-7ab2-ca57-2707aa754cbb

Addresses an issue in which customers with a combination of specific Windows display languages and user preferred language list (UPLL) entries receive an extraneous UPLL entry and input language selector entry. This issue occurs after upgrading to Windows 10 version 1803 and, as a result, customers cannot remove this language entry or its keyboard.

If they use a version earlier to this, the answer might be "update", if they have a later version, the problem might not be the same as in the linked thread.

"beyond what's already evident from the image." The problem is that taking information from the image, does not tell us anything about the system of the OP, it just tells us that a random user on the internet uses a certain version of windows (or used this version 6 years when they posted the image).

IMO that MS article should just be posted in an answer, instead of getting carried away with links, images and versions. I won't post it, since I wasn't the one who found it. In fact, since the question is closed, now nobody can post an answer...

By the way, what do you mean by:

In previous questions by the same person, we had screenshots from all kinds of versions back to XP.

On their profile, I only see one question (this one).

On their profile, I only see one question (this one).

There are persons with more than one account.

IMO that MS article should just be posted in an answer, instead of getting carried away with links, images and versions. I won't post it, since I wasn't the one who found it. In fact, since the question is closed, now nobody can post an answer...

The problem is that the question lacks information to determine if this is the answer or not. Posting this as an answer would be pure speculation.