@sigmasternchen
yes it is quite a lot xD
German is my first language; English I started to learn at age 10 in school, French at age 15. Italian and Spanish followed at 19 (for 2 years). Swedish I've only learned through Duolingo.
I also use Duolingo to keep up my French, Spanish and Italian skills, English I use enough throughout conferences, and various media.
@sigmasternchen
finally, the differences are afaik not about grammar as in sentence structure.
it's more about what meanings a sign has, how important or intense body language, facial expressions, mouthing, etc are.
if you watch e.g. US American SL vs Austrian SL, you can see that there's lots of finger-spelling in USA, and facial expressions are more important in Austrian SL.
⚠️ If you're interested in learning to sign, find a Deaf person/institution & pay for lessons 😘