Spanish campaigns need their own budget, not a spare ad group
Two languages in one campaign means one auction decides how much of your money each audience gets, and it will not decide the way you would.
Separate campaigns give you separate budgets, separate bids, separate schedules and separate negatives. Inside a shared campaign, whichever language happens to convert cheaper that week consumes the other one's spend, and you find out a month later.
The keyword sets are not mirror images either. A Spanish search for family counsel often includes the country context, the word for lawyer varies by origin, and the long tail is shaped differently. Building it by translating the English list produces terms nobody types and misses the ones they do.
Each language needs its landing page in that language, its own call extension routing to someone who can answer in it, and its own form. Sending Spanish clicks to an English page is the fastest way to pay full price for a bounce.
Set the account's reporting so you can read the two sides independently from day one. Retrofitting language segmentation onto a blended account is painful and usually approximate.