There should be no problem moving ahead with Bellafill for your nasolabial folds or laugh lines.  Juvederm and Bellafill work in two different ways so adding Bellafill as a filler for your nasolabial folds now, 14 months after your Juvederm injection is not a problem.  If you liked what you got from your original injection, you should get a great result.
Just remember that you may need to add a little more in the future when the remaining Juvederm has worn off completely.
Here is a before and after Bellafill example of a woman who had Juvederm in her nasolabial folds and then transitioned to Bellafill a year or so after.