When you start delving into languages and linguistics you find that each language has its specific sounds. This means that it can be extraordinarily difficult to lose your native accent or to perfect a second language etc. This shouldn’t worry you too much if you have tried your best. It can in fact be a very attractive feature and one that sets you apart. Secure people like something that makes them different like a usp in products. However if there insecure they will seek to eliminate this facet of themselves and want to blend in completely.
One shouldn’t hide from their native accent or language. Many people sound completely different when they are speaking the languages that they know. This reflects there personality but also the experiences they have had when using that language. It showcases the values and attitudes of a culture too. Which is why people can act in a completely different manner depending on which way of life is currently in control. I have seen it happen and it’s fascinating to behold. If you haven’t come across this yet, there are polyglots who do exaggerated versions on YouTube. Or for more realistic versions check out videos where the person is teaching in one language and explaining in another. If your lucky, this might allow you to observe when they know English to fluency but it’s not their native language.
Certain sounds are easier to replicate than others hence junta is difficult because although it originates from Spain there is no j sound there. In other languages that also possess no j like Greek it becomes unta as there is nothing like that word. It also describes a dark period in recent history that nobody wishes to talk about which may also have something to do with its mispronunciation.