In the description of sorcerer it is stated: "You learn an additional sorcerer spell of your choice at each level except 12th, 14th, 16th, 18th, 19th, and 20th. Each of these spells must be of a level for which you have spell slots."
Since my player has 5th lvl slots because of warlock 9, does he get lvl 5 spells? Because he has a spellslot of this lvl...
I can houserule as the dm, of course, but what is the RAW? for RAI I would honestly say no.