Hi 
Can you try
1. select all the text
2. Format - "Remove direct formating" (top option in that menu)
I'm wondering if there is something odd in the style used by that text. Is
it "body text" or "default"? Whichever it is can you do F11 to bring up
the styles menu and then right-click on the appropriate one and choose
"Modify" (2nd option, i think) then flick through to see if any of the tabs
have anything weird set-up. Maybe the "Font effects" tab?
The best experts about fonts, afaik, are on US time-zones so it'll be a
long while before they are around although i have a feeling there are
others who might be good too. It might be worth re-posting the question to
the international translators. Their address is something like
L10n@Global.LibreOffice.Org
Regards from
Tom 