Error loading LicenseLangString

I am always using Unicode NSIS.
I am creating a multi language installer but I have some problems showing the license text in the right language.

!insertmacro MUI_PAGE_WELCOME

!insertmacro MUI_PAGE_LICENSE "$(license)"



!insertmacro MUI_LANGUAGE "English"

!insertmacro MUI_LANGUAGE "Italian"



LicenseLangString license ${LANG_ENGLISH} "license_en.txt"

LicenseLangString license ${LANG_ITALIAN} "license_it.txt"

This code works with ANSI nsis, but in Unicode I have some problems because of the codification of the LicenseLangString. I saw that in the compile log only english license is encoded in UTF-8 and shown correctly. The others are encoded in UTF-16 LE and not shown with understandable chars.
What can I do to solve this problem?

Maybe I found the problem. I have to convert my text files into UTF-8.