因為我係90後所以呢
Because I'm in my 90s.

Cantonese Sentence Breakdown

因為 jan1 wai6
due to
我 ngo5
I
me
my
us
we
our
self
係 hai6
(Cantonese) to be
to connect
to relate to
to tie up
to bind
to be (literary)
to involve
relation
relationship
consequence
yes
indeed
right
後 hau6
back
behind
rear
afterwards
after
later
descendants
then
a surname
future
after next
succeeding
所以 so2 ji5
hence
呢 ni1
this