Description:
Currently, when searching for tracks using the Deezer metadata source, the query string is passed through unidecode. This can lead to incorrect or unexpected results, particularly when users search for non-Latin script content (e.g., Japanese track titles).

We’ve encountered similar issues before (see refs #5699 and #5705), and a fix was already implemented in the Spotify plugin to preserve the original query string.

Suggested Solution:
Adapt the approach used in the Spotify plugin to avoid unidecoding the query in the Deezer plugin. This should improve search accuracy and better respect user input for international content.