1. Install Perl

2. Put natlang words and frequencies into input.txt in format like
"iun 0.347 upiog 0.196 emploi 0.160 us 0.123 primin 0.089 amal 0.085"
(i.e. the order is Chinese Hindi English Spanish Russian Arabic)

3. run "perl scoreGismu.pl input.txt". But under Windows you may just run "scoreGismu.bat"