As the language spoken by billions of people around the globe, English is naturally one of the most frequent languages found at online casinos. It is safe to say that around 99% of online gambling operators are English speaking operators. They cater primarily to players from English-speaking countries such as the UK, Australia, Canada, New Zealand, South Africa, and America (although that's somewhat rare these days).
Popular Currencies at English Speaking Casinos
Since these online casinos cater to players from English-speaking countries, it is only natural you'll often find a nice selection of currencies you can deposit, withdraw, and play in. These include UK pound (GBP), EUR, USD, Canadian dollar (CAD), Australian dollar (AUD), New Zealand dollar (NZD), South African Rand, etc.
Some casinos in English focus on one or two countries, for example, Australia and New Zealand, or Canada. These casinos will sometimes offer just a few currencies, like USD, AUD, and NZD. Other operators try to cater to wider markets and offer all sorts of currencies for players to use. Sometimes there are even currencies for players from non-English speaking countries.