I currently play a level 9 multiclassed Rogue/Hexblade and one sentence in the Rogue's Expertise confused me a little. It says that at level 6 I gain Expertise with another 2 skills.
Is the 6th level the total character level or the Rogue's level only?
I ask this because on different occasions the PHB specifies those things.
Example Sneak Attack:
The amount of the extra damage increases as you gain levels in this class.
Another one is Eldritch Invocations:
Additionally, when you gain a level in this class, you can choose one of the invocations you know and replace it with another invocation that you could learn
at that level.
So what's the case here, bad wording or when it says simply "level" does that mean the character's level and not class level?
Best Answer
Given that the option to Multiclass is explicitly an optional rule, any text within a class referring to level is always referring to levels in that class.
The chapter on Multiclassing explains what changes when you allow characters to have multiple classes, but with the exception of Spellcasting (which is explicitly called out in that chapter) everything else is dependant on the levels in the class granting the ability.
Note also, that the features for each class are shown in the Class Features table, which are specifically for members of that class. All the basic explanations for features are written as "at Xth level" because they are in the specific class section for the class they are for. Only abilities that grow or change with your level call out "in this class", because it's possible to gain a level in a different class, but you would always be referring to that other class' features table to see what happens to your character.