[Tomisimo]

Originally Posted by Alfonso

I'm thinking Spanishly.

I'd say:
I'm thinking in Spanish.
I'm thinking like a Spanish speaker.
I'm thinking like a Spaniard.

Originally Posted by Alfonso

• In Spanish you can use jerga de abogados, if the English term hasn't got a very good connotation.
• In Spanish you can use jerga de abogados, just in case the English term hasn't got a very good connotation.

Let's see if I understand. What you're saying is:

If the English term (legalese) doesn't have a very good connotation, then in Spanish you can use the term jerga de abogados, which also doesn't have a very good connotation.

The way you've written it isn't very understandable. If you want to say it like this, I'd turn the sentence around and say:

If legalese doesn't have a very good connotation, you can use jerga de abogados, which also has a negative connotation, otherwise try lenguaje jurídico, which is more neutral.