Wrong encoding of downloaded json

After a search, when you download the results in a json file, it seems that encoding is wrong.

If you check with VScode, the exported results is declared as UTF-8 encoding. But french accented characters are not displayed correctly.

If you force opening the same file with ISO-8859-1 encoding, french accented characters are correctly displayed

Solution: force generating the file in UTF-8 encoding ?

To check:

• how characters are stored in mongo and elasticsearch ?
• which encoding ?
• It may depends of the source file encoding when imported in the SI