Answer
P(other than only English or only Spanish) $=0.07$
Work Step by Step
The event "a household speaks a language other than only English or only Spanish at home" is the complement of "a household speaks only English or only Spanish at home".
According to 38.a, P(only English or only Spanish) = 0.93.
Now:
P(other than only English or only Spanish) = 1 - P(only English or only Spanish) = $1-0.93=0.07.$