Consider these three options,
Linguistics(Adept Power)
Through enhanced memory and mimicry, adepts with this power are able to learn new languages after a minimal amount of exposure to it, without spending Karma. To learn a new language, an adept must be exposed to the new language for (12 – Magic Rating) hours, (minimum 1 hour). The adept then makes a Logic + Intuition Test using the Linguistics Table. If successful, the adept gains the language at Rating 1. Further development of the new language requires normal Karma expenditure.
Linguist(Quality)
Nothing impresses an out-of-town Johnson more than negotiating in their native tongue. And knowing when they’re telling their goon squad to kill you is pretty useful too. This quality represents a natural gift for learning and understanding languages. Characters with this quality halve the learning time for a language, and the quality also provides a +1 dice pool modifier to all Language skill tests the character makes. If this quality is purchased at character creation, the player purchases Language skill points at a 2-for-1 rate. After character creation, language skill ranks of 3 or higher receive a 1 Karma cost reduction for each rank.
Given a Magic rating of 6, learning a lvl 1 language from Linguistics would take 6 hours,
Would the learning time boost from the Linquist quality cut that in half to 3 hours of exposure to learn a language?
Also,
Jack of all trades Master of None(Quality)
The character has an incredible aptitude for learning new skills. Unfortunately, the character quickly gets bored and gets turned off when things start getting a little hard. Karma costs are reduced by 1 (to a minimum of 1) for learning skills up to Rating 5. Beyond Rating 5, however, it costs 2 additional points of Karma for each point of skill. This quality does not apply during character creation.
Also
Does the Karma cost reduction from Jack of all trades and Linguist stack for ranks 3-5?