Boy, I'm glad you asked. I'm in a yoshinkan dojo at the moment but next year I'll be changing countries, and there's only Aikikai where I'm going.
So I'll be 'changing codes' too. I found the web resources are not so hot on Yoshinkan terms: we are outnumbered, I suspect.
When I started I knew nothing. I found Total Aikido by Gozo Shioda
as much an excellent resource for the language as well as for the techniques.
Also, Aikido: Exercises for Teaching and Training by C M Shifflett
is pretty good for connecting the language together: when Ms Shifflett describes a techinque, she gives all the names used in the different styles as well as references in different texts.
You are not alone.