Sometimes, people who don't grow up speaking English as their first language might say some words differently than people who do. This is because they learned how to say those words in their own language, which might have different sounds and letters than English. For example, someone who speaks Spanish might have a hard time saying the "th" sound in "the" because that sound doesn't exist in Spanish.
This doesn't mean that their way of saying words is wrong - it's just different! And it's important to remember that everyone learns things differently and at different paces. Plus, non-native speakers might bring unique perspectives and ways of thinking to the English language, which can be pretty cool!
The most important thing is to keep practicing and trying new ways of saying words. As you practice, you'll get better and better at speaking English and people will be able to understand you more easily. And if you're ever unsure about how to say a word, just ask! People are usually happy to help.