How can I implement a consistent coding style in a team with developers from different programming backgrounds?

I totally feel you, I've been in similar situations where coding styles were all over the place and it was a real pain to maintain the codebase. I think the first step is to get everyone on the same page and agree on a coding style, which it sounds like you've already tried to do. One thing that might help is to have a discussion with the team about the benefits of a consistent coding style, and see if you can come to a consensus on what that style should be.

Once you've got a style guide in place, tools like linters and code formatters can be a huge help in enforcing it. I've used tools like ESLint and Prettier in the past, and they've been really effective in keeping our codebase consistent. These tools can automatically check your code for style issues and even fix them for you, which can be a big time saver. You can also integrate them into your development workflow, so that they run automatically when you commit code or push it to your repository.

I think the key is to make it as easy as possible for your team to follow the style guide, so that it becomes second nature. You could also consider setting up a code review process, where someone reviews each other's code before it gets merged into the main branch. This can help catch any style issues before they make it into the codebase, and it's also a good way to ensure that everyone is following the same style. Overall, I think it's definitely worth the effort to get a consistent coding style in place, it can make a big difference in the long run.

I hope that helps, and good luck with getting your team's coding style sorted out! It's definitely a challenge, but it's worth it in the end to have a clean and maintainable codebase. If you have any more questions or need further guidance, feel free to ask and I'll do my best to help out.