When you upload a file with non-English characters in its name using the File Uploader element, those characters may display as percent-encoded values (e.g. %C3%A9 instead of é). The file itself is fully accessible and usable — only the displayed name is affected.
What you might notice
File names with accented or non-English characters appear as percent-encoded strings (e.g. %20, %C3%A9) in the File Uploader element
The same file uploaded with the Multi-file Uploader displays the characters correctly — the two elements behave inconsistently
Workaround
There's no workaround to change how the file name is displayed in the File Uploader element. As an alternative, the Multi-file Uploader element handles non-English characters correctly if your use case allows for it.
Status
We're aware of this inconsistency between the two uploader elements. Addressing it requires a product decision on how to align their behavior, so we don't have a fix timeline yet.