Again, as I stated before, this is just my
opinion that NBPNP are targeting those with french language skills for these sessions in Morocco and Senegal (because the sessions are being held in French). I don't know for sure.
So (and again, this is just my
opinion) it would be better for you if you understand and speak French so you are able to follow whatever the speaker is saying in the session.
BUT (and this is a
BIG "but") if you have received an invitation to attend the session from NBPNP, then they must feel that not knowing french is not an issue, and so I think by all means you should definitely attend the info session!
Attending the session is absolutely beneficial. Attending an info session can be used as a Connection to NB when submitting an EOI to NBPNP. An information session attendance is valid for 24 months to use as a connection. So as soon as NBPNP opens the EOI window for overseas candidates, you can send them an EOI (provided of course, that your NOC is on their in-demand occupation list)
Good luck and I hope you get to submit an EOI to NBPNP soon