Which cryptocurrency exchanges operate in Portugal?

As a keen observer of the cryptocurrency market, I'm curious to know which exchanges cater to investors in Portugal. With the ever-evolving regulatory landscape and increasing interest in digital currencies, it's essential to understand which platforms provide a secure and compliant trading environment for Portuguese users. Are there any locally based exchanges that have gained significant traction? Or are international exchanges that offer multi-currency support and language options the preferred choice? I'm also interested in knowing if there are any specific regulatory considerations or restrictions that Portuguese investors need to be aware of when selecting an exchange.