"I am quite sad."
Translation:Jestem trochę smutny.
Troche means 'a little'. Quite means 'very'. These seem to be nearly opposites to me.
Time to love English words :
a little or a lot but not completely- Cambridge dictionary BrE
to a very noticeable degree or extent - Merriam Webster AmE
I looks like creators went with BrE here.
I see the examples under the UK definition you suggest, but they all seem like normal things I would say where "quite" still means something in the neighborhood of 6-8 out of 10, where a little, or a bit, is more like 1-3. But to avoid debating English semantics, trochę is unambiguously more like a little, without the dual meaning?