Frontal-temporal stroke. does that involve broca's?

Perhaps: It depends which side and how extensive the stroke was. It may affect broca's area in which case there would be some type of speech impairment.

It could: A fronto-temporal stroke can involve the broca's region if it is on the dominant side of the brain. Most people's broca's (speech production center) is on the left. So a left fronto-temporal stroke can involve the broca's in the majority of people.