I have noticed an error in the language names within the translator.
Depending on the user interface language setting, duplicate language names appear, for example, the English (UK) variant is displayed as "English".
The problem is not limited to a single UI language; it occurs in several interface versions.
For example (I have indicated the region in the screenshots):
Polish:

Luxembourgish:

I have not checked for more cases, but there may be more such errors. It also appears that the problem only affects English language variants, although I do not rule out that it may also occur with other languages.
Each language variant should be correctly distinguished.