Languages:
Languages are something of a mess. I get it, 5e tried to streamline the language rules from prior editions. It doesn't help that all the games I have played pretty much reduced language rules to the binary "you understand / don't understand what is said" with nothing else.
But the new rules also open up a bunch of holes.
Q: Can you take a specialization in a Native language? Example: As a Native English Speaker, can I specialize in City Speak? What happens then - am I considered a Native City Speak speaker / reader?
Q: What if I am a Native Japanese speaker - can I specialize in Creole? (Thus making me a Native level Creole speaker / reader.)
Jargon transcends language, and doesn't fit well within a language specialization. Example: Military Jargon. JAFO, NATO, SNAFU, FUBAR, etc. aren't exactly limited to language, nor automatically understood by someone who speaks that same base language.
Unfortunately, my best suggestions are not any less complicated.
But I would suggest releasing a downloadable PDF of the the previous editions Language Family charts.
The simplest suggestion I have is to (along with the Family Chart) just make languages a proficiency, rather than a full fledged skill. Something like:
Unskilled Practitioner Fluency | Proficiency level 0 Proficiency level 1 Proficiency level 2 | No test possible Social Skill Limit is 1/2 Social Limit (round down) Social Skill Limit is the full Social Limit |
Characters would get one free Fluency at character creation, and a second one with the Bi-Lingual Quality.
Proficiency levels would cost (off the top of my head) 7 Karma, and 1 month training each.
You can use another language proficiency if it falls within the same family, but your Limit is reduced by half (round down) again. So a Practitioner using a different language in the same family would have a Limit of 1/4 Social Limit round down.
Linguasofts would then have to change as well, I would suggesting making them a single rating item and price them as if they were Rating 6.
((EDITed to clean up word usage))