I've extracted the words from 8077 Ontario Court of Appeal judgements and calculated the 100 most frequently used words.

The most common case-related words are what you'd expect: "appellant", "judge", "trial", etc.

The word "appellant" appears almost three times as often as "respondent". The word "judge" appears four times more often than "counsel".

Word Number of Mentions
that365205
appellant106100
judge103432
this102567
trial100160
with95195
evidence74917
court70564
appeal70340
from64364
would54153
have53253
which43971
were42717
respondent39375
there38807
order36712
under35278
case34801
been32876
justice30178
they28883
counsel26660
made26500
crown26053
other26015
ontario25253
their24790
issue24374
could24340
also24173
whether24034
when23855
motion23699
jury23406
reasons23303
these23271
application22583
between22412
time21928
should21896
before21495
view19110
first18805
claim18674
costs18663
against18577
because18434
only18348
para18327
about18237
person18185
appellants18098
after17939
canada17564
however17519
where17474
such17331
will17170
must16998
decision16935
found16620
police16532
agreement16241
sentence16154
does15860
reasonable15682
defence15557
circumstances15297
date14977
parties14759
action14738
into14612
what14322
those14297
basis14047
said13896
fact13885
respect13816
some13608
criminal13495
than13465
section13202
make13178
both13126
agree12974
right12879
offence12779
respondents12528
statement12466
part12159
more12159
judgment12108
support12016
information11990
while11971
property11787
accused11782
complainant11740
years11697