Unless your speaking Chinese... If I use Tagalog terminology with my Chinese speaking teacher, he's not going to know what the hell I'm talking aboutWhen I'm talking to a mixed group of martial artists who speak English, I'm going to use English terminology. If I'm talking to mainly CMA people, I'm going to use a combination most likely.
Huh?? Too many languages there...

I keep it simple & go just for Cantonese & English.
But I understand what you're saying.
As for principles and training methods... there's no universal chin na training system throughout Chinese martial arts. Different systems might have different methods.
That's right but qin na is qin na. Be it qin na from taiji or from choy li fut. Qin na is a set of ideas, principles & methods. Each style/system/family/whatever is CMA is going to have qin na to match it. The qin na found in CLF may share techs & such with taiji, but not wholly or competely.
The qin na I've learned in CLF shares some ideas, principles & methods I've encountered in the Bujinkan training I've had before. Not the same but similar. In the Buj, it wasn't called qin na.
The qin na I've learned in CLF shares some ideas, principles & methods I've encountered in taiji & bagua training I've had before. Not the same, but similar except since it's CMA, it's called qin na.