does detect internal fonts,help?

hi
may i know if i can download and use fonts in libreoffice portable without installing ?

i have downloaded for some tests several fonts from dafont dot com , i guess they are pretty safe and i have copied in several folders of libreoffice
but it doesn't read or detect them

For users not using the PortableApps.com Platform, you can add additional fonts to the LibreOfficePortable\Data\fonts folder for use with LibreOffice here. (Do not add fonts to the LibreOfficePortable\App\DefaultData\fonts folder or to the LibreOfficePortable\App\libreoffice\Basis\share\fonts\truetype folder)

Note that any fonts placed here will be available to other applications. If any other apps (including local apps) are making use of these fonts and don't properly stop when LibreOffice Portable is closed, you may be unable to eject your drive until you close those apps.

i have copied here
LibreOffice\App\DefaultData\fonts\
LibreOffice\Data\fonts\
with any luck

well , could i use downloaded fonts without installing in libreoffice under w7 and w10 ?
and if yes how?
thanks