for your grading there are some basic Japanese words you need to know       

SENSEI            TEACHER

REI                     BOW        

MATTE              STOP                

HAJIME             GO      

HIDARI             LEFT                

 MIGI                  RIGHT                   

SONO MAMA    FREEZE

YOSHI                UNFREEZE

OBI                     BELT                

OSAEKOMI       HOLD DOWN ON                     

TOKETA           HOLD DOWN BROKEN     

DOJO                 JUDO HALL

ZORIS                SHOES

TATAMI             JUDO MAT

You could make your own Judo dictionary. If there are other words that you want to know the meaning of then ask your Foundation Sensei.