I want to know the answer to the following question:
What decision did he make that influenced the culture in an attempt to make things more homogeneous ?
All the background I'm provided with is that "The Eastern Roman Empire – today conventionally named the Byzantine Empire, a name not in use during its own time – became increasingly influenced by Greek culture after the 7th century, when Emperor Heraclius (AD 575 - 641) decided to make Greek the empire's official language.". Is that enough to answer the question?
Answer: yes