As a native English speaker having lived in four Spanish speaking countries and author of four books on Spanish vocabulary and slang I run across your predicament on a daily basis, often with my Puerto Rican wife.

I learned “book” Spanish as an adult which in my opinion is focused on the Spanish in Spain and to a lesser extent, Mexico. My experience has been that with a strong foundation in Spanish, the vocabulary acquisition once you move from one country to the next is rapid. In addition, Spanish speakers with different vocabulary bases will be able to communicate, although with bumps (sometimes quite embarrasing) along the way.

A basic example I always give is the English word KITE. In different Spanish countries this may be translated as CHIRINGA, COMETA, PAPALOTE, BARRILETE or VOLANTIN. I believe there are a few others as well.

The worry you express is, in my opinion, just part of the diversity of learning Spanish. You may find that your daughter learns both, or even several, sets of vocabulary for the same word, as she grows older.

Jared