As of now, NSIS doesn't fully support unicode so it is better to use
their iso 8859 counterpart.

ISO-8859-1:
- Dutch
- German

ISO-8859-2:
- Polish
- Slovenian

(cherry picked from commit 02a8a0326001760195383e03bb04a047919fe09f)
Signed-off-by: Rafaël Carré <funman@videolan.org>