Every country has their regional colloquialisms. Look at the US, you have southern accents, northern, mid-western, etc. And, then you have sub-accents on top of that....A 'Baahston' accent is different from a "New Yawk" accent. A Nashville accent is different than Louisiana. Etc. Same thing with places like the UK. I've always found it funny that some southern accents here can sound very sweet and pleasant while others just sound like absolute rednecks.

My wife is actually from the Philippines and over there, while Tagalog is the national language, there are many different sub-languages or variations depending what province/islands your from for example...you have the visayan islands which speak visayan but there are even sub-languages there, like cebuano for the people from cebu.